I often go school by bus,but I walk home after school.
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; was C. 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.
—What a nice bicycle! How long have you _____ it ? —For a week.