We all write ____________ even when there's not much to say.

A. now and then B. by and by

C. step by step D. more or less.

Children’s brains cannot develop properly _________ they lack protein.

A. because B. since

C. when D. unless

Supposing you _________ the lottery, what would you do with the money?

A. would win B. have won

C. had won D. won

If our marketing plan succeeds, we _________ the sales by thirty percent next year.

A. would increaseB. will increase

C. would have increasedD. will be increasing

Although we may not realize _________, when we talk with others we make ourselves understood not just by words but also by body movements.

A. it B. them

C. that D. ourselves

It is the respect for universal rights, our respect for different cultures, and our _______to international laws that guide China's openness to other countries.

A. comprehensionB. contribution

C. commitmentD. consideration

This is John’s photo. We miss him very much. He ________ trying to save a girl in the earthquake.

A. is killedB. was killed

C. has been killed D. had been killed

Alex has finally become an astronaut, __________all his family members think is his dream career.

A. whichB. whoC. that D. whom

The information confirms me in the belief __________ he, as well as his coach, is to blame.

A. whether B. why C. which D. that

A horrible thought _________ him when he was waiting for Tom in the airport: what if the plane from Malaysia had been hijacked（劫持）?

A. attacked B. struck

C. beat D. occurred