What will the world use for power when it _______ oil?
| A．run out of | B．is running out of | C．has run out | D．has run out of |
--I don't think we have met before.
--Yes, once at a party, but we___________.
| A．weren't introduced | B．didn't introduce |
| C．haven't introduced | D．were not introducing |
Our new house is very___________ for me as I can get to the office in five minutes
| A．convenient | B．comfortable | C．natural | D．helpful |
--I can't find Mr. Smith.
--It was in the hotel___________ he stayed.
| A．that | B．where | C．which | D．since |
Scientists say it may be five or ten years___________ it is possible to test this medicine on human patients.
| A．since | B．before | C．after | D．when |
My uncle___________ until he was forty-five.
| A．married | B．didn’t marry |
| C．was not marrying | D．would marry |