Children be told not to swim alone in the river．（ ）
A．canB．mayC．mustD．might
When should we hand in my paper？
Your paper must ___as soon as the bell ___（ ）
A．be handed in，rings
B．be handed in，will ring
C．hand in ，rings
D．hand in，will ring
Alice，turn down the TV，please．I ______ on the phone．
Oh，sorry．（ ）
A．have talkedB．am talking
C．talkedD．talk
What are on show in the library？
Some photos _____ on the Great Wall．（ ）
A．are takenB．takenC．are takingD．were taken
Lucy，I've just got my driver's license．
You're great． ______，Bob．（ ）
A．That's all right．
B．I'm glad to hear that．
C．Congratulations
D．It's very kind of you．
Do you know ____ of the earth ____covered with water？
Sure，Mom．（ ）
A．three quarter，isB．three quarters， are
C．three quarters， isD．three quarter， are