根据句意填空：

根据句意填空：

We've never heard him sing, have we?

He's never been heard ______, has he?

One of them is a college student. ______ are middle school students.

Put the watch in the sun or in the light for five minutes, and it can go ______ for about two days.

根据括号要求写出相应部分:

man doctor (复数) ______

It's very kind ______ you to repair the bike for me.

介词填空：

Who has told you that?

______ whom have you been told that?

根据括号要求写出相应部分:

memory (复数) ______

根据括号要求写出相应部分:

lie （现在分词）______