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53. To prevent flooding in winter the water flowing from the dam is constantly ____ by a computer.
A. Managed
B. graded
C. monitored
D. conducted
正确答案是
54. ____ I know the money is safe. I shall not worry about it.
A. Even though
B. Unless
C. As long as
D. However
正确答案是
55. He couldn't lie convincingly enough to take a child ____ .
A. away
B. down
C. in
D. up
正确答案是
56. The parents were worried about Dorothy because no one was aware ____ she had gone.
A. where that
B. of where
C. of the place where
D. the place
正确答案是
57. It was not until she returned home ____ she realized she had almost wasted ten of her valuable hours.
A. and
B. when
C. then
D. that
正确答案是
58. There has not been a great response to the sale, ____?
A. does it
B. has it
C. does there
D. has there
正确答案是