After a long walk in the sun, they wanted to drink _______.
Our government should_____ measures to control the population.
The _____ population has caused many serious problems.
—_____ the population of the U.S.A. in 2005?—It _____ about 296 million.A. What is; is B. What was; wasC. How many is; was D. How many was; is
The population of Shanghai is larger than _____ of Shenyang.
The traffic in the city _____ be terrible, but now it has improved a lot. I think you will _____ it soon.