The buses, most of _______ were already full, were surrounded by an angry crowd.
| A．that | B．it | C．them | D．which |
Injured in ____ hand, the man found it difficult to hold the box in ____ place.
| A．the, / | B．the, the |
| C．/ , / | D．his, the |
_____ time, the teacher had us do half of the exercises in class and complete the other half for our homework.
| A．To save | B．Save |
| C．Saving | D．Having saved |
Anyone ______ trying to take knives on board flights would be caught by the police.
| A．finds | B．being found |
| C．found | D．will find |
While watching television, __________.
| A．the doorbell rang |
| B．the doorbell rings |
| C．they heard the doorbell rings |
| D．they heard the doorbell ring |
It’s reported that global warming is heating the planet twice as quickly as _____ feared.
| A．extremely | B．previously |
| C．preciously | D．eventually |