问题

t sure whether be has finishedwriting the book, but he________ it last month.

A:worked at
B:was working on
C:worked on
D:was working at

正确答案是：

同类题型

The most pleasant thing of the rainy season is _____ one can be entirely free from dust.

I__________ this record for you with difficulty. [ ]

We want someone to design the new art museum forus— ____ the young fellow outside have a try

We were________at what he said．

She spent all her spare time learning thecourses, or she________ the first place in her school in the 2010 CollegeEntrance Examination.