问题

This kind of exercise is most _______, and therefore is a good test of your students’ ability.

A:surprising
B:encouraging
C:exciting
D:challenging

正确答案是：

同类题型

What’s the matter with you and your friend—-She looks very busy. I want to help her, but I don’t know _____.

Mary __ __ be in Paris, for I saw her in the town only a few minutes ago.

Is that the small town you often refer to? — Yeah, just the one ______ you know I used to work for years. [ ]

Are ________ your friends —Yes, they are.

_______ makes the book so extraordinary is the creative imagination of the writer