你想了解对方多久锻炼一次,你可以这么问: ?
The teacher asked Ben (answer) a question in class.
﹣﹣﹣What's he doing?﹣﹣﹣He (use) the computer.
I am very busy Friday.
They like pears, but they don't like (strawberry).
﹣Is that (you)schoolbag?
﹣No, it isn't.