What’s your brother’s name?–_____ name is Dave．

Can you join the ________ club?-Yes. I can swim very ___________.

Peter’s jacket looked just the same as Jack’s, but it cost_____his.

You’ve dropped __________ “s” in the word “across”.－Oh, you are right, __________ letter “s” should be doubled like this “cross”.

The teacher came in_______ a book under his arm.[ ]