The students be in the classroom because there are lights in it.

Could you please tell Peter that I want to talk to him?—Sure.I will let him know as soon as he ________ back.[ ]

I found there was only one copy of “Bighead Son and Small-head Father” on the bookshelf, so I decided to buy _______ at once.

What are those?– are baseballs.

Four hundred dollars for just a pair of shoes? You ______ be joking!