There are two types of clauses, which are ______________.

A、Author-year system

B、In-text citation system

C、Number system

D、Alphabetical order system

There are two types of twins: identical and non-identical twins. Identical twins are formed from a single egg in mother's body which divides to form. two separate babies. Identical twins look the same and are often dressed by their parents in clothes of the same colors. It is often difficult to tell identical twins from each other, even when they are standing side by side. Non-identical twins come into being when the mother produces two separated eggs at the same time, both of which grow to form. babies. In this case the twins look like normal brothers and sisters and are easy to tell one from the other.

In the 1970s and 1980s a scientist did some research into twins. He invited many pairs of identical twins to university and asked them to take part in a week of tests. He was particularly interested in adopted (收养) twins who had been separated at birth. He would give the twins different kinds of tests to study their speed of thinking, their speech, their memory, the ways they saw and heard different things, and so on. Time and time again he found separated twins who preferred clothes of the same color, used the same kind of shaving soap, wore the same shaped square glasses and the same colored socks.

There is a third type of twins, but it is a very unusual one. Twins who are joined together at birth are known in western countries as Siamese twins.

(1)It is difficult to tell identical twins because ____________.

A、they are dressed in the same clothes

B、they are dressed in the same color

C、they are very alike

D、they are standing side by side

(2)If the twins are easy to tell from each other, they are ____________.

A、very probably non-identical twins

B、surely non-identical twins

C、surely identical twins

D、always a brother and a sister

(3)Which of the following is NOT true according to this passage?

A、In the 1970s and 1980s a scientist did some research into the two main types of twins.

B、In the week of tests, he tested their speed of thinking, their speech, their memory and some other things.

C、There were twins who had been separated from each other as soon as they were born.

D、Very often, separated twins were found to choose things of the same kind, the same shape and the same color.

(4)According to the passage, how many types of twins are there actually?

A、one

B、two

C、three

D、four

(5)This passage mainly tells us ____________.

A、the main types of twins

B、what has been found out about twins

C、how twins are formed

D、how a scientist studied twins

Section D

听力原文： Broadly speaking, there are two types of paintings: representational and abstract. The former portrays specific, recognizable physical objects.

For most of history, the primary purpose of painting had been to portray images. Starting with the Post-Impressionists, however, the emphasis began to shift to unconscious feeling.

There are two types of abstract paintings. "Abstracted" paintings may not look realistic, but you can get an idea of what you are looking at. "Pure" abstract paintings are just shapes, colors, lines, patterns, and so on.

In truth, there is a lot more to abstract art than what meets the eye. To truly appreciate a work of art, you need to understand there must be context involved and a particular environment created. More importantly, art allows us indirect access to our inner psyche. Great art affords a way to get in touch with the unconscious part of our existence, even if we don't realize what we are doing.

The reason abstract art has the potential to be so powerful is that it keeps the conscious distractions to a minimum. This, of course, only works if you cooperate with the artist. If you are to truly appreciate a work of art, you must be willing to let yourself go, to put yourself in the hands of the artist, so to speak, and let him take you wherever he wants.

Broadly speaking, there are two types of paintings :【21】and abstract. The former portrays specific, recognizable physical objects.

For most of history, the primary purpose of painting had been to portray images. Starting with the Post-Impressionists, however, the【22】began to shift to unconscious feeling.

There are two types of abstract paintings. "【23】" paintings may not look realistic, but you can get an idea of what you are looking at. "【24】" abstract paintings are just shapes, colors, lines, patterns ,, and so on.

In truth, there is a lot more to abstract art than what meets the eye. To truly appreciate a work of art, you need to understand there must be【25】involved and a particular【26】created. More importantly, art allows us indirect access to our inner【27】. Great art affords a way to get in touch with the unconscious part of our【28】, even if we don't realize what we are doing.

The reason abstract art has the【29】to be so powerful is that i: keeps the conscious distractions to a minimum. This, of course, only works if you【30】with the artist. If you are to truly appreciate a work of art, you must be willing to let yourself go, to put yourself in the hands of the artist, so to speak, and let him take you wherever he wants.

(21)

A、monopolistic competition and oligopoly.

B、duopoly and triopoly.

C、perfect competition and monopolistic competition.

D、duopoly and imperfect competition.

听力原文：(A)There are two telephones in the office.

(B)They are working with computer.

(C)They are clearing the desk.

(D)They are during their coffee break.

A．

B．

C．

D．