11. The reason _____ he failed the exam was _____ he had not worked hard.

　　A. why……if

　　B. why……that

　　C. that……why

　　D. why……what

　　12. When you called me this morning, I _____ the newspaper.

　　A. read

　　B. was reading

　　C. reads

　　D. have read

　　13. _____ to get there on time， we walked as fast as we could.

　　A. hoping

　　. to hope

　　C. hoped

　　D. being hoped

　　14. Walking along the river, he heard someone _____ for help.

　　A. shouting

　　B. shout

　　C. shouted

　　D. having shouted

　　15. _____ into many languages, the book is well known to all.

　　A. Being translated

　　B. Having been translated

　　C. to be translated

　　D. Having been translated

　　16. Most of the people _____ to her party were her old friends.

　　A. Invited

　　B. to invited

　　C. being invited

　　D. inviting

　　17. _____ from the moon, the earth with water _____ seventy percent of its surface.

　　A. See/covered

　　B. Seeing/covering

　　C. Seen/covering

　　D. To see/to cover

　　18. _____ I saw was two men crossing the street.

　　A. What

　　B. Whom

　　C. Who

　　D. That

　　19. The time will come _____ man can fly to outer space freely.

　　A. that

　　B. when

　　C. in that

　　D. what

　　20. Before her marriage, she spent a considerable time in that very part of Shanghai,_____ she belonged.

　　A. which

　　B. to where

　　C. to which

　　D. at which