设函数x=f（y)、反函数y=f-1（x)及f'（f-1（x))，f"（f-1（x))都存在，且f'（f-1（x))≠0，求证：

A.determined; to set

B.being determined; to put

c.determining; to set

D.determined; place

A．My parents never wanted to attend university

B．My parents never went to a university

C．My parents never received a college education

D．My parents never thought about going to a university

A、arrive at

B、set out

C、arrived at

D、set foot in

(句子释义)The wretched boy never set foot upon a football field without scoring a goal.

A. Each time this boy played football, he was sure to get the ball into the goal.

B. This unfortunate boy never played football, as he couldn't score a goal.

C. This boy was unhappy because he didn't kick the ball into the goal.

D. If this boy didn't score a goal he would feel wretched.

According to the third paragraph, the mechanical "foot" is set ______.

A．on the top of the bed

B．at the foot of the bed

C．in the middle of the bed

D．under the bed

ing entirely outside the United States. Individuals and companies that have never set foot on the United States can still get involved in anti-trust litigations in the U.S.

With the guide ______ the way, we set out on foot into the night dark.

A．lead

B．leading

C．led

D．to lead

______I was fifteen that I set my foot in Ireland.

A．It was not until

B．Not until

C．Although

D．Even if

The earliest institution of higher learning set up in America was

A．California University.

B．Yale University.

C．Harvard College.

D．Chicago University.

With the guide ______ the way, we set out on foot into the dark night.

A．lead

B．leading

C．led

D．to lead