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

A. why……if

B. why……that

C. that……why

D. why……what

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

A. read

B. was reading

C. reads

D. have read

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

A. hoping

B. to hope

C. hoped

D. being hoped

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

A. shouting

B. shout

C. shouted

D. having shouted

35. _____ 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

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

A. Invited

B. to invited

C. being invited

D. inviting

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

A. See/covered

B. Seeing/covering