_____ her mother had come, her face lit up.

A. Hearing　　　　B. Having heard C. When heard　　D. When she heard

Would you like Helen _____ you since you have some difficulty?

A. helping　　　B. to help  C. has helped　　D. help

_____ many times, but he still couldn't understand it.

　　A. Having been told　　　　　　　　　　 B. Though he had been told

　　C. He had been told　　　　　　　　　　 D. Having told

I had Helen's brother _____ the windows, but Helen had them _____ instead.

　　A. to clean； cleaned　B. cleaned； cleaned  C. cleaning； cleaned　D. clean； cleaned

—Can those _________ at the back of the classroom hear me?

　　　　—No problem．

　　A．seat　　　　B．sit　　　　　C．seated　　　　D．sat

Many things were stolen and the theft _________ unreported.

   A. became                    B. left                          C. got                                   D. went

The _____, I think, he drew from his simple experiment is not scientific.

A. conclusion             B. charge          C. promise            D. relation

Are they still for holiday in Beijing now?They should have come back now.

________ is quite natural; a beginner can't read the books written in English very quickly.

A. Which             B. As           C. What      D. It   

My dictionary__________. I have looked for it everywhere but still

A. has lost; do not find         B. is missing; do not find

C. has lost; have not found      D. is missing; have not found