The factory ______ its waste into the river, but now it deals with the waste in a new way.
| A．used to dump | B．is used to dump | C．used to dumping | D．is used to dumping |
Would you mind closing the window to stop the wind _______ the papers away.
| A．blow | B．from blowing |
| C．to blow | D．of blowing |
—David has made great progress recently.
—________, and ________.
| A．So he has; so have you | B．So he has; so you have |
| C．So has he; so you have | D．So has he; so have you |
Mary with her sisters ________ Chinese in China.
| A．are studying | B．have studied | C．is studying | D．study |
Students should do everything they can ________ their study.
| A．improve | B．to improve | C．improving | D．improved |
—I don’t know if Dr. White _______ to the party next week?
—I think he will come if he ________ free.
| A．comes; will be | B．will come; will be | C．comes; is | D．will come; is |