_________ worries me the way he keeps changing his mind.

A．This                  B．That             C．What         D．It

The number of people invited __________ fifty, but a number of them __________ absent for different reasons

A.were ; was         B.was ; was          C.was ; were      D.were ; were

Is＿possible to fly to the moon in a spaceship?

A. now            B. man            C. that            D. it

Our manager allowed _______to take a holiday next week.

A. you and I          B. yourself and me     C.I and you     D. you and me       

Nothing is wrong with the radio 　　　　　　?

A.isn't it　　　       B.is that　　　   C.is it　　　       D.isn't that

I don’t think ____ possible to master a foreign language without much memory work.

A. this　             B. that 　           C. its         D. it　　

Many people have come to realize that they should go on __________ balanced diet and make __________ room in their day for exercise.

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

I had a cup of______and two pieces of______this morning.

A．teas; bread                                   B．teas; breads

C．tea; breads                                       D．tea; bread

The sign reads “In case of __ fire, break the glass and push __ red button.”

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