Going on a trip into space must be quite exciting experience.
| A．/ ; the | B．the; the | C．the; an | D．/ ; an |
--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 |
--What ____________when I phoned you?
----I_____________and began to have a bath.
| A．had you done; finished | B．were you doing; had just finished |
| C．did you do; had just finished | D．were you doing; was finishing |
Sometimes words alone were not enough to _________pupils along the path of knowledge
| A．provide | B．persuade | C．advise | D．cause |