单选题
Children are always happy. They can play ______.
A. for their heart's content B. for their heart content
C. to their heart's content D. to their hearts' content
A
B
C
D
【正确答案】
D
【答案解析】
本题考点固定短语。to one's heart's content意思是“尽情地”。句义是“孩子们总是快乐的，他们尽情地玩耍。”
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