句型转换
What were they doing? I don’t know. (合并为一个句子)
I don’t know what _________ _________ doing.
There isn’t any water in the glass. (改为同义句)
_________ _________ water in the glass.
His brother is not only a singer, but also an actor. (改为同义句)
His brother is a singer _________ _________ as an actor.
You mustn’t tell it to anyone. (改为祈使句)
Please _________ _________ it to anyone.
You can stay in the museum as long as you like. (对画线部分提问)
_________ _________ can we stay in the museum?