He looked at those jewels one after another ______andseemed to show no interest in any one of them.

She is ________ in English.

It is widely known that burning coal for electricity is one of the main causes for global warming , but we can’t ignore the cars’ _____ to the greenhouse effect.

There are many people downstairs. What do you think_____

_______hearing the news that Shenzhou ? was sent into space, we shouted________joy.[ ]