Jane didn't have time to go to the concert last night because she was busy ____for the exam.[A] to prepare [B] to be prepared [C] being prepared [D] preparing

Jane didn't have time to go to the concert last night because she was busy ____for the exam.[A] to prepare [B] to be prepared [C] being prepared [D] preparing
Jane didn't have time to go to the concert last night because she was busy ____for the exam.
[A] to prepare
[B] to be prepared
[C] being prepared
[D] preparing

Jane didn't have time to go to the concert last night because she was busy ____for the exam.[A] to prepare [B] to be prepared [C] being prepared [D] preparing
D
be busy doing
主动,非被动

选【A】
be busy to do something，这个事固定说法，所以排除【C】和【D】，
然后主语是she，指的是人，所以应该不是被动，排除【B】。
这些都是应该记住的语法，只要记住就好了！！！

D.be busy doing

D