53. We found the exercise difficult____ without the help of the teacher.

　A. to be done　 B. to do　　　　 C. to do it　　 D. of doing

52. This coat is too hot ____in this warm weather.

　A. to be worn　 B. to wear　　　 C. wear it　　 D. not to wear

51. This park is a very pleasant place____.

　A. to visit　　 B. to be visited　　 C. to visit it　 D. of visiting

50. In order to reach the top of the hill in six hours, they try ___.

　A. to climb the mountain hardly　 B. hard to climb the mountain

　C. to climb hardly the mountain　 D. to climb the mountain hard

49.--- Shall we walk through the park?

　 --- No, it’s too late_____ there .　　　 D. so we can’t walk

　A. that we walk　 B. for us walking　 C. for us to walk

48.would you be ____kind as to step this way, please ?

　A. so　　 B. very　　　 C. as　　　 D. too

47.　 --- did that book give the information you need?

　 --- yes, but ____, I have to read it entirely.

　A. for finding it　 B. to find it　　 C. finding　 　D. finding it

46.--- Will you go to the play with us today?

　 --- I don’t think so. I’m tired to go.

　A. enough　　　 B. too　　　　 C. very　　　 D. so

45.____ a long story short , he wanted to marry her and get a lot of money.

　A. Make　　　　 B. To make　 C. Tom have made　 D. Making

44. ___the truth, she is really tired with cooking.

　A. I am to tell　　 B. Told　　 C. Telling　　 D. To tell