Something terrible happened last night．A thief broke in my house while I ________．

A．will sleep

B．was sleeping

C．is sleeping

D．slept

You've made so many mistakes．Please do you homework ________ next time．

A．careful

B．more careful

C．carefully

D．more carefully

Work hard, ________ you may not catch up with your classmates soon．

A．but

B．or

C．and

D．yet

The reporter asked the boy many questions, but he answered in ________ words．

A．few

B．a little

C．little

D．a few

We must do everything we can ________ waste water from running into rivers．

A．to keep

B．kept

C．keep

D．keeping

I will tell him to call you when my father ________ back．

A．will come

B．came

C．comes

D．is coming

I think ________ of the English books I read last year ________ easy．

A．three-fourths; are

B．third fourth; are

C．three-fourths; is

D．three-fourth; are

________ the age of 15, Li Yundi became famous ________ playing the piano．

A．On; on

B．For; at

C．At; to

D．At; for

________ my mother ________ going to see the patient，because we are both too busy．

A．Neither; nor I am

B．Either; or I are

C．Neither; nor I are

D．Either; or I am

Some ________ went to Japan to help when they heard many ________ lost their homes in the earthquake．

A．Germany; Japan

B．French; Japan

C．Germans; Japanese

D．Frenchman; Japanese