2. 专升本
  3. ______too much to do, they have to keep themselves busy all day long.

______too much to do, they have to keep themselves busy all day long.

admin2019-05-10  8
问题 ______too much to do, they have to keep themselves busy all day long.
选项 A、Having
B、Have
C、Had
D、Being
答案A
解析 句首用动名词形式。
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