It was_____________computer games that took the boy a lot of time that he ought to have spent on his lessons.

A.to have played　　　　　　　　　　　　　　　　　　    B.playing

C.played　　　　　　　　　　　　　　　　　　　　　　　　   D.having played

_____________, this kind of disease can do great harm to people there.

A.Occurring where　　　　　　　　　　　　　　　　    B.It occurs where it is

C.Where does it occur  　　　　　　　　　　　　　　　　   D.Where it occurs

You_____________this morning if you really wanted to see it yourself.

A. ought to come　　　　　　　　　　　　　　　　　　  B.could come

C.ought to have come 　　　　　　　　　　　　　　  D.must have come

____________way to understand thousands of new words is to gain _________good knowledge of basic word formation.

A.The; the　　　　　　　　　　　　　　　　　　　　　　    B. One; a

C.A; the　　　　　　　　　　　　　　　　　　　　　　　　   D.The；/

It was_______impossible to have made________a long journey in_________an old car.

A. quite; such; rather　　　　　　　　　　　　　　　　　　　　　　   B.very; so; fairly

C.quite; such; fairly　　　　　　　　　　　　　　　　　　　　      　　   D.very; so; rather

——It’s wrong for a student to follow_____________his teachers say.

——It’s true, I can’t agree_____________.

A.whatever；more　　　　　　　　　　　　　　　　　　　　   B.no matter what; more

C.whatever; much　　　　　　　　　　　　　　　　　　　　    D.no matter what; much

—I didn’t go to my evening class yesterday because I lost my textbook.

—You _____________ mine. I didn’t have any class then.

A. could have borrowed　　　　　　　　　　　　　　 B.might borrow

C.must have borrowed　　　　　　　　　　　　　　   D.ought to borrow

I don’t know _____________ everyone in my class thinks I’m funny.

A. why is it which　　　　　　　　　　　　　　　　　　 B.why it is that

C.who is it which　　　　　　　　　　　　　　　　　　  D.who it is that

Mr. White _____________ at 8:30 for the meeting, but he didn’t show up.

A.should have arrived 　　　　　　　　　　　　　　   B.should arrive

C.should have had arrived　　　　　　　　　　　　  D.should be arriving

With fewer bison, grass shoots were not eaten, so grass did not grow 　　  .

A. very strongly　　　　    B.as strongly　　　　　　　　 C.rather strongly　　　　   D.too strongly