We should do what we can ___ the endangered animals.----Yes,it’s our duty       them.

He must be in trouble now. What should I do?---______ .he will be OK .

My brother _____  to the ground while ____  his bicycle and hurt his leg .

--I’m sorry I _____ my exercise book at home.--Don’t forget _____ it to school tomorrow, please.

I’m having a good time __________photos. It’s interesting.

His family ______ TV at home now.

—— Could you help me_______ when the plane will take off on the Internet ?—— I’m sorry , my computer doesn’t  work.

A: I have a problem. I don’t know what to do .B: Let’s ask Dick for help .He can ______ a good idea to solve your problem .

— Is there a library in Gaochun? — Yes, a new library _______ and is now open to the public.

— It’s raining heavily outside. — Indeed. I prefer ________ at home ________ on such a day. 

— Could I have an interview with Mr Green now, please?— Sorry, he _________ a meeting. You’d better wait a minute.

— Excuse me, will the plane for Beijing _________within an hour?— I’m not sure. You can go to the Information Desk for help.

— Sorry, I’m late. Has the film begun?— It doesn’t matter. The film _________ for several minutes.

---  _____ you_____your room yet?   --- Yes. I_________it a moment ago.

When I was at the college , I _______ up early to do some body building exercise . 

About two years ________ since the earthquake took place in Wenchuan.

 He told me that he ________ here for five minutes.

 Would you mind        me how        this physics problem ?

He is so careless that he often         his school things at home.

 —I think Mr Zhang may be in his office. —No, he        be there. I saw him        just now.