Please be careful when you walk ______ the street. There are so many cars.
| A．with | B．over | C．across | D．behind |
Be careful when you walk________the street．
| A．through |
| B．over |
| C．above |
| D．across |
—What a cool day！How about climbing Mount Tai？
—________．Let’s ask Yang Liu to go with us．
| A．Never mind |
| B．Not at all |
| C．Sounds great |
| D．Good luck |
—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 |