问题
选择题
I ______ keep dogs for protection, but now I keep them as pets. [ ]
A. would rather
B. had better
C. used to
D. have to
答案
答案：C
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I ______ keep dogs for protection, but now I keep them as pets. [ ]
A. would rather
B. had better
C. used to
D. have to
答案：C