They have no idea at all ____.
| A．what he is working on | B．what is he working on |
| C．what did he work on | D．what he is working |
-—David has gone to Australia on business.
—Really? I ______ why he was absent from today’s meeting.
| A．am wondering | B．wonder | C．was wondering | D．had wondered |
Hearing the news, she rushed out, _____ the book _____ on the table, and disappeared into the distance.
| A．left; lain open | B．left; lay open | C．leaving; lie opened | D．leaving; lying open |
Jack was halfway back to the village where his mother lived _____ Mary caught up with him.
| A．when | B．while | C．until | D．though |
People Who Moved China, hosted by CCTV, honours the people______ the valuable contributions should be remembered by every Chinese．
| A．whose | B．of whom | C．that | D．of which |
It looks like __________ weather is changing for __________ worse. We had better cancel the trip to the mountains.
| A．the; the | B．不填; the | C．the; 不填 | D．不填；不填 |