1．It was John who broke the window.Why are you talking to me as if I ____________(do) it?
答案：had done
2．As John Lennon once said, life is ____________ happens to you while you are busy making other plans.
答案：what
3．If I ____________(not be) lucky enough to meet you, I really don’t know what I would have done.
答案：hadn’t been
