—I am worn out now. I stayed up last night to finish the report.
—Oh? You ______. The professor asked us to hand it in next week.
| A．needn’t have | B．wouldn’t have |
| C．couldn’t have | D．can’t have |
To battle world hunger, the great scientist once traveled to many places where populations _______ faster than crop production at that time.
| A．expanded | B．were expanding |
| C．has expanded | D．would expand |
The government won’t have the public officials ___ asking for gifts or money from people.
| A．coming up with | B．putting up with |
| C．getting away with | D．doing away with |
Unfortunately, some natural signs which might have helped more people survive the earthquake were ________.
| A．abandoned | B．ignored |
| C．deserted | D．rejected |
. ___________ the extreme levels of air pollution, city authorities have started to take measures to quickly reduce pollution levels and protect city dwellers.
| A．In spite of | B．As well as |
| C．In response to | D．By means of |
Whenever I read the old letters, _____ was fairly often, sweet memories warmed my heart.
| A．who | B．which | C．when | D．that |