AIDS is said ________ the biggest health challenge to both men and women in that area over the past few years．

that it is

to be

that it has been

to have been

From the ________ look on his face, we knew the scene of the accident must have been ________．

frightened; frightened

frightened; frightening

frightening; frightening

frightening; frightened

The survey a computer corporation is now ________ on the Internet is aimed at collecting opinions from the public about their IT products．

contacting

contracting

conducting

attracting

He likes studying ________ ancient history and can remember many events happening in ________ history very clearly．

/;/

the;/

the; the

/; the

In this city ________ lived people who had discovered how to stay healthy．

/

where

which

that

________ clear nights, you can clearly see the Milky Road across the night sky．

In

At

On

During

They were pleased to see that the women’s position ________ in their country．

stepped up

had stepped up

had stepped in

had been stepped up

Everyone thinks the question is ________ carefully．

very worth considering

quite worth being considered

well worth considering

much worth to be considered

Take the dry wood away ________．

in case it catches fire

in case it will catch fire

in case of it catches fire

in case it catches a fire

The man repeatedly claimed it was not he who ________ the woman’s purse．

stole

was stealing

had stolen

would steal