问题

here any possibleway to help them get rid of such a bad habit ——To tellthe truth, it’s very hard. But we_______ on this problem.

A:worked
B:had worked
C:are working
D:had been working

正确答案是：

同类题型

The girl couldn’t_____ how red his facewas

下列文化常识中，说法有错的一项是（）

Tom hasn’t finished what he was saying—HeIalready know what he has in mind

Tony wanted to take some good photos,______ he lost his camera.

Where can we get your latest children’s story? —-Soon. It _______ and will come out next week.[ ]