George, the lonely tortoise, was said ________ on a tiny island of Pinta in 1971．
| A．to have discovered | B．to have been discovered |
| C．having discovered | D．having been discovered |
I’m sorry I'll have to ___ your present.
| A．turn off | B．turn out | C．turn over | D．turn down |
The woman I ___ last night is Mrs. White.
| A．paid a visit | B．had a talk | C．dropped in | D．came across |
I forgot his phone number that day.I had to ___ the phone book to find it.
| A．look up | B．look through | C．look to | D．look at |
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 |