— The doctor is busy ________ his work.
A．at B．for C．with D．on
________ the small town is!
A．What beautiful B．What abeautiful
C．How beautifully D．How beautiful
Could you tell me_________？
A．where is the headmaster
B．whose camera it is
C．what Jack was happened
D．how long does it take you to your school?
—I phoned you at 7:00 this morning. But there was no answer.
—Well, maybe I _________ morning exercises at that time.
A．was doing B．did C．is doing D．would do
—I’m sorry for giving you so much trouble.
—__________.
A．You’re welcome B．No problem C．All right D．It doesn’t matter
In recent years, the economy of our country _________ rapidly.
A．is increased B．has increased C．increased D．has been increased
