______ him enough time to get home before you telephone. 

Most museums are just for looking. But today some of them have things for you to touch. The signs say, "________!"

Don’t _______ too much TV. It’s bad for your eyes.

—I have to be at the office by noon tomorrow. My co-workers are taking me out for a final good-bye lunch. — ________ Where are you going to eat? —I don’t know. They want to treat me.

 That hazy（雾霾）weather has hit 104 cities in middle-east China lately makes citizens well aware of ______a terrible problem China is faced with.