51. You can't let the situation get worse. You must take _____.

　　A) decisions

　　B) sides

　　C) directions

　　D) steps

　　52. It's difficult to _____ with the knowledge that he is a failure.

　　A) feed

　　B) live

　　C) stay

　　D) get on

　　53. Millions of workers were on the streets in the greatest _____ of working class solidarity this country has ever seen.

　　A) demonstration

　　B) explanation

　　C) presentation

　　D) communication

　　54. My sister's professor had her _____ her paper many times before allowing her to present it to the committee.

　　A) rewritten

　　B) to rewrite

　　C) rewrite

　　D) rewriting

　　55. Scarcely had her husband arrived home _____ his wife started complaining.

　　A) when

　　B) that

　　C) than

　　D) and

　　56. Only ______ you have obtained sufficient data can you come to a sound conclusion.

　　A) when

　　B) that

　　C) than

　　D) and

　　57. I told him how to get there, but perhaps I _____ him a map.

　　A) should have given

　　B) ought to give

　　C) had to give

　　D) must have given

　　58. A body weighs _____ from the surface of the Earth.

　　A) less the farther it gets

　　B) the farther it gets, the less

　　C) less than it gets farther

　　D) less than it, the farther it gets

　　59. You never told us why you were late for the last meeting, _____?

　　A) weren't you

　　B) didn't you

　　C) had you

　　D) did you

　　60. _____ it is you've found, you must give it back to the person it belongs to.

　　A) That

　　B) Because

　　C) Whatever

　　D) However