Last term our maths teacher set so difficult an examination problem _____ none of us worked out.
| A．that | B．as | C．so that | D．which |
This is the plane _______ he went to Shanghai ______ business.
| A．where, for a | B．by which, on the |
| C．in which, on | D．where, on |
______ that she should come here on time.
| A．Suppose | B．Demand | C．Think | D．Believe |
At no point south of the Han River _______ more than a mile.
| A．the enemy didn’t advance | B．the enemy advanced |
| C．did the enemy advance | D．didn’t |
Only at that time ______ that he had made a lot of mistakes in his homework.
| A．He realized | B．did he realize |
| C．he did realized | D．realized he |
He ______ prison two years ago and now he _______.
| A．was put in; was set free | B．was shut into, is set free |
| C．put into, has been set freely | D．was put into; has been set free |