第一句少了个in 应为 I live in Beijing.

问：Where do you live?

第二句office前的c不用的吧。

问：Whose office is this?

第三句提问：How much are they?

同义句 ：

1 He would like to collect stamps.

引申一下也可以用：

He likes collecting stamps.

2 I think she is short.

3 原文可能打错了。原文应为：There is not any milk in the glass.

There is no milk in the glass.或

There is little milk in the glass.