The world's population is increasing_________80 million every year.
A.as B.by C.in D.if
—I'm interested in traveling. — _________.
A.So I am B.So am I C.So do I D.So I do
We must_________the policy to control the heavy traffic in the city.
A.carry out B.take out C.bring out. D.look out
What's the result of the greenhouse effect? —It causes the level of the sea_________.
A.rise B.raise C.to rise D.to raise
Doctor Li, is there anything wrong with my eyes?— No,_________is OK.
A.something B.nothing C.everything D.none
— Have you ever been to Beijing?:Yes, last month I_________there.
A.have been B.have gone C.will go D.went
