— It’s time to go home, let’s go.
—Please _________ the light when you leave the classroom.
| A．turn on | B．turn off |
| C．turn down | D．turn up |
The Chinese mainland has become the world's second______ market for iPhone.
| A．big | B．bigger |
| C．biggest | D．the biggest |
Now China is fighting against illegal cooking oil（地沟油）, a kind of waste oil _____can cause a lot of illness.
| A．which | B．whose |
| C．who | D．what |
____9:16 p.m. ______September 29, 2011, Tiangong 1 was sent up into space successfully.
| A．At, in | B．At, on |
| C．In, in | D．In, on |
– Let’s go and listen to Mr Smith’s talk on Western culture, shall we?
–_______ It’s getting to the end.
| A．Why not? | B．That’s all right. |
| C．I’m afraid not. | D．Never mind. |
In fact he knows this place very well, for he ________ there three times.
| A．has been | B．has been to |
| C．has gone | D．has gone to |