40.＿＿several times, the young scientist still kept on making his experiments.

A.Having been failed　　　 B.Having failed

C.Though failed　　　　　　 D.Because of failure

39.I know it’s not important, but I can’t help ＿＿about it.

A.to think　　　　　　　　 B.and think

C.thinking　　　　　　　　 D.being thought

38.-- What do you suppose made her worried?

-- ＿＿＿a gold ring.

A.Lose　　　　 B.Lost　　　　 C.Losing

D.Because of losing

37.She made a candle＿＿＿us light.

A.give　　　　 B.gave　　 C.to give　　 D.given

36.＿＿＿, your composition is full of mistakes.

A.Writing carelessly　　　 B.Written carelessly

C.Having written carelessly

D.Being written carelessly

35.The policeman put down the phone, ＿＿＿with a smile on his face.

A.satisfied　　　　　　　　 B.satisfying

C.to be satisfied　　　　　 D.having satisfied

34.At the shopping-centre,he didn’t know what＿＿and＿＿with an empty bag.

A.to buy； leave　　　　　 B.to be bought； left

C.to buy； left　　　　　　 D.was to buy； leave

33.We are looking forward to＿＿＿the film＿＿＿＿at the Grand Cinema.

A.seeing； to show　　　　 B.see； shown

C.seeing； shown　　　　　 D.see； to show

32.I don’t mind＿＿＿by bus, but I hate＿＿in queues.

A.traveling； stand　　　　 B.to travel； to stand

C.traveling； to stand　　 D.traveling； to standing

31.The students expected there＿＿＿more reviewing classes before the final exams.

A.is　　 B.to be　　 C.being　　 D.have been