题目

The man is optimistic ________ his life and doesn’t ________ at all. A. about；lose heart                              B. about；lose his heart C. on；lose heart                                 D. of；lose hearts   答案： A be optimistic about sth.对……乐观；lose heart灰心，固定用法，中间没有冠词或者所有格形式。  

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