从渣的用途看，干渣块不能用作铺路用。（）
参考答案：错
用所给词的适当形式填空。
1. Peter should _____ (allow) to take the test later.
2. What school rules do you think should _____ (change)?
Is it that you often play computer games ________ worries your parents?
A．why
B．that
C．which
D．what
