.I was about to get on the bus _________...

We must do what we can to ____________the river ______________.

  A. protect; against polluting       B. stop;  polluting

  C. keep; being polluted          D. prevent; from being polluted

Paper produced every year is  _______________the world`s production of vehicles.

    A.three times the weight         B.the three times weight

C.as three times heavy as        D.three times as heavier as

根据对话情景和内容，从对话后的选项中选出能填入每一空白处的最佳选项，选项中有两项为多余选项。注意：E涂AB     F涂AC    G涂AD

—  What seems to be the problem?

—       6    

—  How long have you been like this?

—  Since Saturday night.

—  ____ 7    

—  Yes, I also feel lighthearted.

—  Can you think of anything you ate Saturday that might have caused it?

—  All I can think of is the fish I had. It didn’t taste quite right.

—  ____ 8      Now I’ll give you some medicine. Take it and you should be feeling better soon.

—  ____ 9    

—  I also suggest that you follow a special diet.

—  ____10    

—  You should stick to eating lighter foods.

A.     What’s that?

B.      That might be it.

C.      Thank you, doctor.

D.     Any other problems?

E.      I have a running nose.

F.      Have you seen a doctor?

G.     I have a terrible stomachache.

______________should be paid to our study,and only in this way ________make progress.

 A. Heart;we can                B. Mind;can we

 C. Attention;can we             D. Notice;we can

This machine is very easy      . Anybody can learn to use it in a few minutes.

   A.  operating    B.  to be operating    C.  operated       D.  to operate