问题

When the teacher came into the classroom, the students ____ in groups.

A:work
B:have worked
C:were working
D:are working

正确答案是：

标签： came , teacher , when

同类题型

One of the most interesting places in Wenzhou____are often visited by foreigners is Yandang Mountain.

What _____ things would you like ?

I didn’t havemoney for a taxi, so I had to walk back home.

I’ve got really ____ while hearing the bad news.

Quzhou is a wonderful place,visitors come here every year.