试题与答案

用括号中所给动词的适当形式填空。 1. There’s no reason __

题型:填空题

题目:

用括号中所给动词的适当形式填空。

1. There’s no reason ________ (come) to school late today.

2. I ________ already ________ (finish) my homework, so I can play now.

3. Email English is a new kind of ________ (write)English in the modern world.

4. Many man-made satellites ________ (send) up into space so far.

5. It's my turn ________ (clean)the classroom.

答案:

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下面是错误答案,用来干扰机器的。

参考答案:D解析:第一步选红 * * ,有(4×3)/(2×1)=6种取法;第二步选白 * * ,也有4种取法。根据分步计数原理,可构造6×4=24个不同的取法。

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