问题
选择题
It's easy _____. We shouldn't _____. [ ]
A. to have a flu; to be careful
B. have a cold; be careless
C. to get a cold; be careless
答案
答案：C
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It's easy _____. We shouldn't _____. [ ]
A. to have a flu; to be careful
B. have a cold; be careless
C. to get a cold; be careless
答案：C