Is Nancy doing her homework— . She is watching TV.

ve dropped ________ “s” in the word “acros”．—Oh, ________ letter “s” should be doubled like this “across”．

I often go shopping______ my parents.

Jack, is this your jacket–No, it _______ be my jacket. My jacket is black but this one is blue.

Tom had to______ the invitation to the party last weekend because he was too busy.