According to the traffic rules, you _________ wear the safe belt while you are driving.

---Do you still remember when we went to Chong qing?----I can’t remember now but_____ sometime last summer?

 Don’t put off today’s work till tomorrow. I mean, today’s work _____today.

–Mom, may I go swimming with my friends in the river? –No, you _________. That’s too dangerous.

As a well-known Chinese saying goes, “If you want to be rich, you______ first build roads.”