Meng Peij ie，an ordinary girl who was among the 10 people awarded the title of “Touching China 2011”，must be both optimistic and strong-minded. Otherwise, she _______ her disabled adoptive mother for 12 years.
| A．mustn't have looked after | B．can't have looked after |
| C．couldn't have been looking after | D．shouldn't have looked after |
—How about your travel?
—You can hardly imagine what difficulty we have had ___________ the vast desert.
| A．exploring | B．explored | C．to explore | D．explore |
Hissisterlefthomein1998,and_________since then.
| A．hadnotbeenheard | B．hasnotbeenheardof |
| C．hadnotheardof | D．hasnotheardof |
Thepoliceman’s_________trafficdirectionsmadeallthedriversquite ___________.
| A．confused;confused | B．confusing;confusing |
| C．confused;confusing | D．confusing;confused |
The president is talking on ____ phone with astronauts in ____ space.
| A．不填；the | B．the; the | C．the; 不填 | D．不填；不填 |
The chief editor demanded that the article _________ immediately.
| A．must be submitted | B．would be submitted | C．submits | D．be submitted |