______ useful information you've emailed me!
| A．What a | B．What | C．How | D．How a |
—When did you start your math homework？
—One hour ago，but I________it yet．
| A．didn’t finish |
| B．finished |
| C．have finished |
| D．haven’t finished |
—Every year________tourists come to the island．
—________of them is about one million．
A．a number of；A number of
B．the number of；A number of
C．a number of；The number of
C．the number of；The number of
—when will A Bite of China Ⅱ begin tonight？
—It________for ten minutes．
| A．will begin |
| B．has begun |
| C．will be on |
| D．has been on |
—Have you ever________to a zoo？
—Yes，but only once．I visited Beijing Zoo last year．
| A．gone |
| B．been |
| C．visited |
| D．seen |
—The radio is too noisy and there is nothing interesting on it．Why don’t you________？
—All right．I’ll do that．
| A．turn it on |
| B．turn it off |
| C．turn it back |
| D．turn it up |