第二部分语言知识及应用（共两节，满分45分）
第一节单项填空（共15小题，每小题1分，满分15分）
从A、B、C、D四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
---Excuse me,but I couldn't help noticing your necklace.
---________
A.Oh,it was a present from my parents.
B.Oh,sorry,I've never noticed that myself.
C.Noticing too much is no good,isn't it?
D.Mind your own business,please.
一Is there any possible way to help them get rid of such a bad habit?
一To tell the truth, it’s very hard．But we on this problem．
| A．worked | B．had worked | C．are working | D．had been working |
When it air pollution, Beijing faces the three “C” s，cars，coal and construction，which lead to Beijing's thick air pollution．
| A．refers to | B．comes to | C．happens to | D．speaks to |
Once education is made free，many children who have dropped out of school .
| A．will come back | B．came back | C．have come back | D．had come back |
When I lived with my roommates in the university, we often talk into the night
| A．might | B．could | C．should | D．would |
Not until quite recently that language is closely related to culture．
| A．he realized | B．did he realize | C．had he realized | D．he did realize |