— the population of the U.S.A. in 2009?
—It about 309 million.
A.What is; is B.What was; was
C.How many is; was D.How many was; is
Last night Dad and Mum didn’t come back home ________ I finished my homework.
| A．while | B．if | C．until | D．and |
Work hard, ___________ you’ll get good grades.
| A．but | B．and | C．so | D．or |
The people were afraid, because the tiger had escaped _________ the zoo.
| A．from | B．on | C．to | D．of |
________Tom ________ Mary speaks Chinese well, so they can communicate with Chinese students very well.
| A．Neither ; nor | B．Not only ; but also |
| C．Both ; and | D．Either ; or |
_________of people will visit Beihai .
| A．Thousand | B．Thousands | C．Thousands of | D．Thousand of |