_____ his immediate help with my sick daughter, I treated him in an expensive restaurant.

A. In return for　 B. Because of　 　 C. Thanks to　 　 D. In case of

That is the only way we can imagine________ the overuse of water in students’ bathrooms.

　 A．reducing 　　　　 B．to reduce　　　 C．reduced　 D． reduce

_____ a reply, he decided to write again.

A. Not receiving　 　　　　　 B. Receiving not　 　　　　

C. Not having received 　　　　 　　D. Having not received

I wish I ___ able to tell him all about it last night．

  A．should be   B．were   　　 C．had been   D．was

You made the same mistake for　　 third time, dropping_____ “u” in the word “unusual”.

A. a, the 　 B. a, a　 　　　 C. the, an 　　 D. a, an

—Have you ____ some new ideas?

—Yeah. I’ll tell you later.

A. come about　　 B. come into　　 C. come up with　 D. come out with

He felt a great affection _________ his wife.

A. for　　　　　

B. at　　　　　

C. of　　　　

D. in

They have prepared to _____ _____ ______（攻击）on the enemy.

Mr. Green drove slowly on the way home until he reached the high way, _____ the speed limit was to miles per hour. 
  A. because      B. which       C. where       D. that

Doctor David, the man who discovered ____ new drug for heart disease which has won him great honor, refused to attend ____ conference of little significance.

　 A. a; a　 B. the; a　 C. the; the　 D. a;/