Each time ___ we have done our homework, we will go over it.

He is a foreigner, ___ I knew from his accent.

Betty always tells lies，___ her parents find strange.

____ we know now, oceans cover more than 70 percent of the earth.

We must teach her a good lesson ___ she likes it or not.

We don't know ___ to pay a visit to the old town.

The question __ we will hold the sports-meet next Sunday will be decided very soon.

We were very much surprised at the way ___ she treated the old woman.

___ a terrible storm would take place in Hainan.

The playground ____ we built last year is very large.

The playground ___ we play football is very large.

she is satisfied with what you have given him and ___ you have told him.

I would appreicate ___ very much if you could tell me something about bird flu.

The boy dived into the water and after ___ seemed to be a long time, he came up again.

—Did your uncle phone you again the next day? ---No, it was a fortnight ___ he gave me a second call.

____ has finished the work ahead of time will be rewarded though we don't know who it will be.

He has made another wonderful discovery,___ of great importance to science.

We should have teamspirit but there are a few occasions_____members are uncertain of their roles.

Let’s just read this little bit_____you’ve make a mistake.

In his book,he explains both ______ it means to be a scientist and ______ science works.