If the green light isn’t on, ___________ a minute.

 — Excuse me, can you tell me the way to the Xinhua Bookstore?— Yes.        down this road and turn left. It’s on Jiefang Road.

 ____ the boy is to learn to talk.

The smoggy weather has made us realize       terrible problems we are laced with．

—English has a large vocabulary, hasn’t it?—Yes. ________ more words and expressions and you’ll find it easier to read and communicate.