—Do you still remember when we went to Nanjing?
—I can't remember now but ________ sometime last summer?
| A．might it be | B．could it be |
| C．could it have been | D．should it have been |
During the scientific experiment, Mr. Chen carefully poured the water into the tube, with my classmates _______ beside to see what would happen.
| A．were standing | B．stood | C．standing | D．to stand |
I don’t think she will come to the meeting on time, _________?
| A．do I | B．do you | C．will she | D．won’t she |
I really appreciate ________ to relax with you on this nice island.
| A．to have had time | B．having time | C．to have time | D．to having time |
Now in China some young people ______ important positions in the government．
| A．hold | B．seize | C．catch | D．grasp |
Generally speaking, prices of daily goods ______ through the Internet are lower than store prices．
| A．to buy | B．are bought | C．buying | D．bought |