问题
选择题
He often tells the children _______ when they play water sports.[ ]
A. be careful
B. to be careful with
C. to be careful
D. not be careless
答案
答案：C
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He often tells the children _______ when they play water sports.[ ]
A. be careful
B. to be careful with
C. to be careful
D. not be careless
答案：C