Smoking can be _______ (有害的) to your health.

Only when class began ______ that he had left his book at home.（ ）

A. will he realize 　　 B. he did realize　

C. did he realize 　　 D. should he realize

According to the news report, ______ have been injured in the big forest fire.

A. many a firefighter　　　　　　 　 B. more than one firefighter

C. a great many firefighters　　　 D. a good number firefighters

---In summer the weather is terribly hot in Nanjing.

----_______

A. So is it　 B. So it is　 C. It is so　 D. It so is

I _______ bacon and eggs every morning.

A. am used to eat B. used to eatingC. am used to eating D. use to eat

That was really a splendid evening.It’s years　 　　 　 I enjoyed myself so much.?

A.when　　　　　　　 B.that?　　　　　　　　 C.before　　　　 D.since

. Our country 　　　 　vegetable.

A. is rich in B. are rich in

C. was rich on D. rich for

C.has not decided    D .have not decided