Nuclear ______ be really dangerous at times even though it’s a nice energy in general.

A. shall B. should C. can D. Must

It worried her a bit _________ her hair was turning grey.

A. while B. that C. if D. For

As a famous public figure, you have a duty to _______ yourself, especially in public places.

A. focus B. behave C. guide D. Operate

_____ doing more exercise to lose weight, many teenagers would rather be a couch potato.

A. Instead of B. As a result of

C. In spite of D. Regardless of

– You look so young. Haven’t you graduated from your university ?

- Yes, I _______ in the English Department of Zhejiang Normal University for four years.

A. was studying B. study

C. had studied D. studied

While staying in the village, James unselfishly shared whatever he had with the villagers without asking for anything ______ .

A. in return B. in common

C. in turn D. in place

----You don’t go to that supermarket quite often, do you?

----No，I only go there ________ because it’s too far away from my house.

A. occasionally B. constantly

C. eventually D. frequently

Have you seen the boys _______ “Little Apple”？That’s such a beautiful scene that I dare not have my eye _____ on it.

A. dancing; fixing B. dance; fixing

C. dance; fixed D. to dance; fixed

Luggage may not be brought into the building ________ a guard has checked it first.

A. when B. because C. after D. unless

When you phoned me, I was having a meeting; how I wish I _______ your call.

A. answered B. would answer

C. had answered D. would have answered