2. 外语
  3. Linda did not have time to go to the concert last night because she was busy ______ for her experiment.

Linda did not have time to go to the concert last night because she was busy ______ for her experiment.

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问题 Linda did not have time to go to the concert last night because she was busy ______ for her experiment.
选项 A、to prepare
B、to be prepared
C、being prepared
D、preparing
答案D
解析 be busy doing something是正确的表达方式，故选项A和B是错的。从本题的意思来看并没有被动的含义，因此选项C也是错的。
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