1.I first met Lisa three years ago when we()at a radio station together.A.have worked B.had been working C.were working D.had worked2.Jack left his key to the bike in the library.划线部分（ his key to the bike ） （ ）（ ）Jack（ ）in the library?
问题描述：
1.I first met Lisa three years ago when we()at a radio station together.
A.have worked B.had been working C.were working D.had worked
2.Jack left his key to the bike in the library.划线部分（ his key to the bike ）
（ ）（ ）Jack（ ）in the library?
答
1.C
2.What did leave
答
1.C
2.what did leave
答
1.C 从句子判断,没有明显的前后之分,因些用过去进行时.
三年前我初识LISA,当时我们在一家广播电台一起共事.
2.What did jack leave in the library?