John opened the door. There _______ he had never seen before.

We got here Tuesday afternoon—__________Why didn’t you call usearlier

Let me teach you how to download music from the Internet — Teach me? ______! I know how to do it earlier!

Could you please tell us some good ways to learn English well? —My suggestionis that reading often and writing regularly_____be needed

There are some trees on one side of theroad and some factories on _____.