It is pretty well understood controls the flow of carbon dioxide in and out the atmosphere——青夏教育精英家教网——

It is pretty well understood __________controls the flow of carbon dioxide in and out the atmosphere today.

There is a new problem involved in the popularity of private cars ____________ road conditions need ____________.

A．that; to be improved

B．which; to be improved

C．where; improving

D．when; improving

______ made the school proud was ______ more that 90% of the students had been admitted to key universities.

A．What…because

B．What…that

C．That…what

D．That…because

The road is covered with snow. I can’t understand ________ they insist on going by motor-bike.

A modern city has been set up in ________ was a wasteland ten years ago .

After Yang Li Wei succeeded in circling the earth, _______ our astronauts desire to do is walk in space.

The other day, my brother drove his car down the street at ________ I thought was a dangerous speed.

Along with the letter was his promise ________ he would visit me this coming Christmas.

I have always been honest and straightforward , and it doesn't matter_______I'm talking to.

Parents are taught to understand ________ important education is to their children’s future.

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