2. 外语
  3. The old man is used to ______ early in the morning.

The old man is used to ______ early in the morning.

admin2014-08-25  40
问题 The old man is used to ______ early in the morning.
选项 A、exercise
B、exercising
C、exercised
D、exercises
答案B
解析 be used to doing sth：习惯于做某事。其中的to是介词，因此后面接动名词。
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