—What does PM 2.5 mean?
—It's a professional ________ indicating the condition of air pollution.
| A.term | B.item | C.number | D.mark |
The new policy allows a couple to have a second birth____either is an only child.
| A.if only | B.on condition that |
| C.unless | D.until |
It’s crazy of you to spend more time playing computer games than you _______ studying.
| A.are | B.have |
| C.do | D.will |
--Do you think you can finish the project by five o’clock this afternoon?
---_______. I’ll be busy with my term paper all day.
| A.Not a little |
| B.Not a chance |
| C.Not a bit |
| D.Not to mention it |
This hotel is the highest building in the city, from _______ top you can enjoy a good view of our city.
| A.which | B.its |
| C.that | D.whose |
Knowing what colors look good _______ your skin is of great importance when you buy clothes.
| A.beyond | B.within |
| C.against | D.over |