— 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
I enjoy playing computer games, but I can't spend too much time ________ that.
| A．in | B．on | C．for | D．to |
________ is bad for your eyes ________ TV too much.
| A．It; to watch | B．It; watching |
| C．This; to watch | D．This; watching |
She is ________ poor ________ buy that nice dress.
| A．so; that | B．too; to |
| C．to; too | D．that; so |
—How often do I need to feed the dog?
—It ________ food every day, or it will be hungry.
| A．must give | B．must be give |
| C．must be given | D．must be gave |
—It's difficult to get to the other side of the river.
—I think a bridge ________ over the river.
| A．should be built | B．should build |
| C．will build | D．has built |