2. 外语
  3. We worried about ______ he was in good health.

We worried about ______ he was in good health.

admin2010-03-03  56
问题 We worried about ______ he was in good health.
选项 A、whether
B、if
C、that
D、what
答案A
解析 我们担心他是否健康。介词的宾语从句只能用whether引导，不能用if。
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