[2013·安徽卷] From space, the earth looks blue. This is ________ about seventyone percent of its surface is covered by water.
| A．why | B．how |
| C．because | D．whether |
(2013·安徽，21)From space, the earth looks blue. This is ________ about seventyone percent of its surface is covered by water.
| A．why | B．how |
| C．because | D．whether |
impresses me most is Chinese students are well organized and disciplined. We should learn from them.
| A．Which; what | B．What; that | C．What; whether | D．That; what |
Then moment _________ Mary will always remember is _________ Mr．Black gave her a lot of valuable advice on how to improve her writing．
| A．when; that | B．that; that | C．that; when | D．when; where |
—I rang you at about nine，but there was no reply．
—Oh，that was probably I was seeing the doctor．
| A．why | B．when | C．what | D．that |
It is often said that home is _______ the heart is and now part of my heart is with my new classmates.
| A．what | B．how | C．where | D．when |
Courage is a kind of quality --- and that’s __________it takes to face the challenges in life.
| A．that | B．which | C．why | D．what |
—We were surprised to hear that the reason ________ she gave for her absence was ________ her mother was ill.
—Yes.We saw her mother was at the supermarket that morning.
| A．why；that | B．which；that |
| C．that；because | D．why；because |
—The two people speak different languages and can not communicate with each other well.
—Oh，I see.That’s ________ misunderstanding occurs.
| A．when | B．what | C．that | D．why |
The reason ________ he didn’t come is ________ he was ill.
| A．why；that | B．that；why |
| C．why；because | D．why；what |
Water，which seems so simple and common，is ________ makes life possible.
| A．what | B．that |
| C．which | D．how |
I’m afraid he’s more of a talker than a doer，which is ________ he never finishes anything. (2011·山东，26)
| A．that | B．when |
| C．where | D．why |
—We were surprised to hear that the reason________ she gave for her absence was________ her mother was ill.
—Yes，we saw her mother was at the supermarket that morning.
| A．why；that | B．which；that |
| C．that；because | D．why；because |
—Sir, I feel it complicated to apply to a university abroad.
—Why not read our guide? This is ________ the relevant information is available.
| A．what | B．how |
| C．where | D．why |
The problem is ________ sometimes when we are given something on a constant basis, we start to take them for granted and forget being thankful for what we already have.
| A．that | B．how |
| C．where | D．which |
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