____________ Davy called me, I was sleeping.
| A．Until | B．When | C．While | D．Because |
—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 |
Shanghai is _______ one of the two cities.
| A．the larger | B．larger | C．the largest | D．largest |