She ________ come to the party, but I am not quite sure.

Have you finished your homework?— Not yet. But I _______ it in half an hour.

Jack, your father has gone out without this umbrella!—Well, take it easy. _________ he comes back for it.

We’ll have a class meeting. Don’t leave the classroom ______ 6 o’clock. [ ]

. — What’re you going to do to protect the environment? — Plant trees on side of the river.