The weather in the south is generally warm, but it________ be very cold sometimes.

—We want someone to design the new art museum for us.—______ the young fellow have a try?

---Dad, must we wait until the light becomes green?---Yes,I’m afraid we      .That’s the traffic rule.

The new law states that people _______drive after drinking alcohol.

My new pen ______. Who ______ have taken it?