Earth Day is a reminder that we need to ________ the world we live in and that we should learn to respect life and nature．

care for

think about

care about

think for

The boy wanted to ride his bicycle in the street, but his mother told him ________．

not to do

not to

not do it

do not to

He left the place, ________ never ________ back again．

determined; to come

being determined; to come

detetmined; coming

determining; to come

Many countries are making great efforts to help the economy ________ after a difficult period．

add

return

recover

calm

I know of him, but I have no idea ________．

where does he live

he lives where

where lives he

where he lives

－How about going out for a walk after supper?

－________．

Good idea!

That's right．

You are welcome．

My pleasure．

－Your job ________ open for your return．

－Thanks．

will be kept

will keep

had kept

had been kept

Studies show that the things that contribute most to a sense of happiness cannot be bought, ________ a good family life, friendship and work satisfaction．

as for

in view of

in case of

such as

－________ he managed to get the information?

－Oh, a friend of his helped him．

Where was it that

What was it that

How was it that

Why was it that

I told him it was a bad idea, but Dave's so ________ that he just never listens．

ambitious

strict

stubborn

straightforward