66. _______ I’m mistaken, I’ve sent that man before.
A. Unless B. If
C. Because D. Provided
67. I will never forget the ten years _______ we both spent in the little village.
A. when B. during which
C. which D. in which
68. The experiment, ______ will soon be announced, was done by my colleagues.
A. whose results B. the results on which
C. at which the results D. of whose results
69. I wrote it down _____ I should forget it.
A. in case B. in case of
C. in order that D. for fear that
70. He has lived here for years, ______ nobody knows what he is.
A. and but B. though
C. and yet D. for all that
答案:66-70 ACAAC
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