—Whose shirt is this?
—It ______ be Li Lei’s. It is too big for him.
| A．could | B．must |
| C．might | D．can’t |
—Have you worked out the problem，Jane?
—Yes，of course．I have just________to the teacher’s office．
| A．been |
| B．got |
| C．come |
| D．gone |
—There________be a lot of animals in the forest，but now we can hardly see them．
—We’re supposed to do something．
| A．will use to |
| B．use to |
| C．used to |
| D．are used to |
—Where are you off to for your winter vacation?
—I am off to a place________I can relax．
| A．where |
| B．that |
| C．which |
| D．what |
In the 1960s，a lot of old city walls in Beijing________because people thought them useless．
| A．pull down |
| B．have pulled down |
| C．were pulled down |
| D．had pulled down |
—Where is Tom?
—He________playing basketball on the playground．
| A．is seen |
| B．saw |
| C．be seen |
| D．was seen |