Can you tell the _____ difference between the words “require” and “ request”? I sometimes get puzzled by their meanings.
| A．dramatic | B．regional | C．apparent | D．subtle |
Mary ___________to see you．She．_________ for you downstairs at the moment．
| A．has come；is waiting | B．came；is waiting |
| C．has come；waited | D．came；was waiting |
__________ in thought，he almost ran into the car in front of him．
| A．Losing | B．Having lost | C．Lost | D．To |
_____________to somebody，a British person often shakes hands with the stranger.
| A．Introducing | B．To introduce |
| C．To be int．roduced | D．On being introduced。 |
D0 you consider it any good__________the truck again?
| A．to repair | B．repairing |
| C．repaired | D．being repairing |
The bad weather meant__________ the rocket launch(发射)for 48 hours,．
| A．delaying | B．having delayed |
| C．to delay | D．to have delayed |