The question that puzzled them is ____ they can get rid of the air pollution in the area.
| A．how is it that | B．that how | C．that it is how | D．how it is that |
As is known to all, Yang Liwei has become a space hero is we have expected．
| A．that; which | B．what; that | C．what; which | D．that; what |
Courage is a good quality and is ________ it takes to get over difficulties.
| A．that | B．what | C．which | D．where |
Great changes have taken place in my home town. It’s no longer ______ it was ten years ago, ______ I spent my childhood there.
| A．what, when | B．that, where | C．as, which | D．which, that |
Everyone is different and that is ________ makes our world so much better.
| A．that | B．which | C．what | D．who |
_______ is even important is ______ as the earth cooled down, water began to appear on its surface.
| A．That, that | B．What, that | C．What, what | D．It, that |
—These days I feel exhausted and lack strength.
—That’s _____too much drinking and poor diet lead.
| A．what | B．which | C．why | D．where |
One concern people have now is ______ printing passengers’ names and ID numbers on tickets will make it harder to protect their private information.
| A．whether | B．when | C．how | D．that |
I’m afraid he is more of a talker than a doer, which is _________ he never finishes anything.
| A．that | B．when | C．where | D．why |
— Do you think it wise for Chinese mothers to try to do everything for their children?
— No, that’s ______ they are mistaken.
| A．where | B．when | C．so | D．how |
---I prefer spending much time solving the problem to consulting my teacher.
---That’s_______ I don’t agree. You should turn to your teacher for help if necessary.
| A．when | B．where | C．what | D．how |
Why the explosion occurred was ____ the laboratory attendant had been careless.
| A．for | B．because | C．since | D．that |
—I prefer shutting myself in and listening to music all day on Sundays.
— That’s _________ I don’t agree. You should have a more active life.
| A．where | B．how | C．when | D．what |
Great changes have taken place in that school. It is no longer it was 20 years ago，_____ it was so poorly equipped．
| A．what；when | B．that；which | C．what; which | D．which；that |
Faced with difficulties, you should believe your confidence is _______ makes a difference.
| A．what | B．that | C．which | D．whether |
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