题目内容：

 

1.Zhang Cunhao and Cheng Kaijia are both great         (science).

2.Mary, a friend of        (I), is very helpful and modest.

3.Mr and Mrs Green are going to celebrate their 20 years of        (marry) tomorrow.

4.It’s        (pleasant) to see so much smog in the sky.

5.I think human beings and animals should live together       (peace) on the earth.