—We need a person badly to be in charge of this design.—________ the new comer have a try?

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

 ---Let's go to the train station by bus.---We______take a bus. It is quite near from here.

A: Listen! Is it Linda singing in the next room? B: No, it __________ be her. She is still in Shanghai.

(2013·济南一模)—Can you keep the secret?—You ________ worry —  I'm not going to mention it to  anyone.