The students put down their pens when the teacher_____ them to stop writing.

Hey, man. You can’t cross the street now. You have towait ______ the traffic turn green.—Oh, sorry and thank you.

(安徽省马鞍山市2009届高三第一次教学质量检测) It was reported that as many as 50％of patients do not take medicinedirected，has drawn doctors’attention

We have never been to Mexico , what about Jeff —– _________. He hopes to visit it some day .

Mary, do you think you are different from Debbie–Yes, I’m________________ at drawing than her.