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51. He must have had an accident, or he ________ then.
A) would have been here
B) had to be here
C) should be here
D) would be here（A）
52. It was essential that the application forms ________ back before the deadline (截止日期).
A) must be sent
B) would be sent
C) be sent
D) were sent（C）
53. We ________ our breakfast when an old man came to the door.
A) just have had
B) have just had
C) just had
D) had just had（D）
54. The rain was heavy and ________ the land was flooded.
A) consequently
B) continuously
C) constantly
D) consistently（A）
55. The children went there to watch the iron tower ________.
A) to erect
B) be erected
C) erecting
D) being erected（C）
56. The engine ________ smoke and steam.
A) gives up
B) gives in
C) gives away
D) gives off（D）
57. The manager promised to keep me ________ of how our business was going on.
A) to be informed
B) on informing
C) informed
D) informing（C）
58. Don’t ________ this news to the public until we give you the go-ahead.
A) release
B) relieve
C) relate
D) retain（A）
59. She never laughed, ________ lost her temper.
A) or she ever did
B) nor did she ever
C) or did she ever
D) nor she ever did（B）
60. The goals ________ he had fought all his life no longer seemed important to him.
A) after which
B) for which
C) with which
D) at which（B）
