去除小批量花生中黄曲霉毒素的适宜方法是A．挑选霉粒法 B．加水搓洗法 C．微生物去毒法 D．加碱去毒

One must live in the United States for five years in order to _____ citizenship.

A.appeal to

B.accept

C.approve of

D.apply for

The United Kingdom (英国) is a country of cities. When a country has many cities, we say it is urban. The United Kingdom is one of the most urban countries in the world. 80% of its people live in cities. London is one of the world's biggest cities. People from many countries now live there. You can hear different languages spoken there.

We say the United Kingdom is an urban country because it has

A．a lot of people

B．many foreign people

C．a lot of cities

A. Both parents must be university students.

B. The parents must live in university housing.

C. Children must be at least six years old.

D. At least one of the parents must be studying for a doctorate degree.

______ (live) there for many years, she knew the place quite well

______ here at the top of the mountain with no one else near, you must be very lonely.

A．Lived

B．To live

C．Living

D．Being live

What is one of the things that must be done before man can live on Mars？

A．Its surface must be studied.

B．Its temperature must be raised.

C．Big spaceships must be built.

D．Its air must be purified.

What is one of the things that must be done before man can live on Mars？

A．Its surface must be studied.

B．Its temperature must be raised.

C．Big spaceships must be built.

D．Its air must be purified.

______(live) here at the foot of the mountain with no one else near, you must be very lonely.

A．Every 2 years.

B．Whenever one dies or must resign.

C．Every 6 years.

D．Every 4 years like the president.