问题

Has Timmy finished his painting yet—I guess not. He______on it when I walked past the classroom.

A:is working
B:was working
C:has worked
D:had worked;

正确答案是：

同类题型

Mother holding jobs outside the home should have _______ schedules to make it easier to care for their children.

While copying this paper, be careful not to ______ anywords.

Yifu library was named ______ a businessman devoted toChina’s education.

Urban crowdedness would be greatly relievedif fares ______ on public transport were more reasonable

was wondering whether you could remember the name of the place.—I’m afraid that ______ me for the moment.