—Oh, my God! My English book is nowhere to be seen.
—You __________ it at home.
| A．should have left | B．would have left |
| C．must have left | D．could have left |
______ by a greater demand of vegetables, farmers have built more green houses.
| A．Driven | B．Being driven | C．To drive | D．Having driven |
It is reported that the floods have left about _________ people homeless.
| A．two thousand | B．two-thousands | C．two thousands | D．two thousands of |
When you get the paper back, pay special attention to what ________.
| A．have marked | B．have been marked | C．had marked | D．had been marked |
Students should be encouraged to use ________ Internet as ________ resource.
| A．不填; a | B．the; a | C．the; the | D．不填; the |
No matter what you say, I shall _____ my opinion.
| A．carry out | B．keep up | C．insist on | D．stick to |