So far we have done a lot to build a low-carbon economy, but it is________ ideal. We have to work still harder.
| A．next to | B．far from | C．out of | D．due to |
Anyone, once ____ positive for H7N9 flu virus, will receive free medical treatment from our government.
| A．to be tested | B．being tested | C．tested | D．to test |
（2013·北京卷)I took my driving license with me on holiday, I wanted to hire a car.
| A．in case | B．even if | C．ever since | D．if only |
“You can’t judge a book by its cover,” ________ .
| A．as the saying goes old | B．goes as the old saying |
| C．as the old saying goes | D．goes as old the saying |
（2013·安徽卷)From space, the earth looks blue. This is about seventy-one percent of its surface is covered by water.
| A．why | B．how | C．because | D．whether |
（2013·安徽卷)It’s much easier to make friends you have similar interests.
| A．unless | B．when | C．even though | D．so that |