It is a good way to keep both teachers and students_______.
| A．to happy | B． happying | C．happy | D． happily |
The _____ population has caused many serious problems.
| A．increase | B．increased |
| C．increasing | D．increases |
—_____ the population of the U.S.A. in 2005?
—It _____ about 296 million.
A. What is; is B. What was; was
C. How many is; was D. How many was; is
The population of Shanghai is larger than _____ of Shenyang.
| A．that | B．those | C．it | D．one |
The traffic in the city _____ be terrible, but now it has improved a lot. I think you will _____ it soon.
| A．use to; use to | B．get used to; used to |
| C．used to; get used to | D．get used to; use to |
—What a nice bicycle! How long have you _____ it ?
—For a week.
| A．buy | B．bought |
| C．had | D．have |