I arrived home at midnight, _______ my parents had been waiting for nearly three hours.

    A. at that time    B. by that time    C. at which time   D. by which time

Our school has used computers in teaching for ten years. As a result, not only______, but students become more interested in their lessons.

    A. has teachers’ energy been saved   B. saved was teachers’ energy

    C. teachers’ energy has saved        D. was saved teachers’ energy

Your niece is very strict and ______ worth teaching, but your nephew is not. Look, he is now ______ asleep in class.

    A. well; fast           B. much; very   C. very; fast       D. well; very

—Have you seen my dictionary?

   ---- Is it _______ you bought last week? Perhaps _______ is on your bed.

    A. one; that        B. the one; it    C. the; there         D. one; here

---Look, our headmaster is over there, playing basketball with some students of our class.

   --- Oh, he must be ________ to his students.

    A. possible         B. valuable    C. available        D. accessiblee

Almost all of his time ______ experiments, he has no time to visit his parents.

A. devoted to do                        B. devoted to doing

C. devoting to doing                    D. is devoted to doing

--- _________?

--- Fine. I’ve got used to the climate here, and my health has improved lot.

 A. How are you                    B. How are you doing 

 C. Are you getting on well         D. How do you do

--- How funny the game is!

   ---Yes. It ______ memories of my childhood.

A. called out           B. called for           C. called up    D. called on

Paper produced every year is_______ the world’s production of vehicles.

   A. the three times weight of             B. three times the weight of

   C. three times as heavier as             D. as three times heavy as

The coat made of this kind cloth _____ well. I think it is worthy _______.

A. washes; buying                       B. is washed; buying

C. washes; to be bought                 D. is washed; to be bought