用所给词（组）的适当形式填空

assist, disable, a matter of, limit, gift, important, potential, play, challenge, come up with

Education can always ________ an important role in the development of society.

用所给词（组）的适当形式填空

assist, disable, a matter of, limit, gift, important, potential, play, challenge, come up with

He can always learn language easily. People say he has a ________ for language.

根据汉语补全句子

他为当选学生会主席而自豪．

He ________ be elected chairman of the Students' Union.

改写同义句

I am sorry that I have put you so much trouble.

I am sorry to ________ ________ you so much trouble.

改写同义句

I am very glad that I am working with you.

I am very glad to ________ ________ with you.

改写同义句

He pretended that he was listening to English course when I came in.

He pretended to ________ ________ to English course when I came in.

改写同义句

I hope that I'll see you again.

I hope ________ ________ you again.

改写同义句

I feel to help others my duty.

I feel ________ my duty to ________ others.

改写同义句

I saw him cross the road.

He was seen ________ the road.

改写同义句

To make electricity by building a dam across the sea is possible.

________ is possible to ________ electricity by building a dam across the sea.