同义句转换 1. I think he is not so tall as hi

题目：

同义句转换

1. I think he is not so tall as his father.

I think his father is _____ ____ him.

2. I like dolphins because they're cleverer than any other animal.

I like dolphins because they're    ___ ____ animal.

3. This road is 10 kilometers long. That road is 300 meters long.

This road is ____ ____ ____ that one.

4. I'll stay here instead of going there with you,

I won't go there with you. I'll stay here ____.

5. This passage is short and there are no new words in it, but it is difficult to understand.

____ this passage is short and there are no new words in it, ____ it is difficult to understand.