Look,there ____ some junk food on the table.
| A．is | B．are | C．has | D．have |
—Do you believe there are aliens？
—I’m afraid not．I don’t think aliens________in space．
A．can find
B．can be found
C．can’t be found
This kind of bicycle________in Tianjin．
| A．is made |
| B．are made |
| C．made |
| D．makes |
I can’t hear you．Would you please speaK________？
| A．clearly enough |
| B．clear enough |
| C．enough clear |
| D．enough clearly |
Food and drink should________to be brought into the reading room．
| A．not to allow |
| B．allow |
| C．not be allowed |
| D．not allow |
Attention，please！All the mobile phones must________before the meeting starts．
| A．turn off |
| B．be turned off |
| C．be turning off |
| D．turned off |