问题

Can you believe_little children can finish the difficult problem in_ a short time—I can’t believe it until I see it with my own eyes.

A:on
B:at
C:for
D:to;

正确答案是：

同类题型

Science is _____ difficult for some students ____ learn, so many of them don’t like it.

rgot your purse when you went out.——Good heavens, _________

Very few people spent as much time ______Hepburn did _______ for charities.

She left homewihtout dinner asif

下列句子中划线词的活用类型，和例句相同的一项是（）例句：外无期功强近之亲，内无应门五尺之僮