-----when has the country been open to international trade?
-----1978, I suppose.
A.Since | B.In | C.From | D.After |
Though it was in the midnight, ________ there were a lot of people in the street.
A.and | B.but | C.yet | D.however |
The ground isn't wet. It ________ have rained last night.
A.mustn’t | B.shouldn’t | C.wouldn’t | D.can’t |
We tried to find a table for seven, but they were all _______.
A.run out | B.taken up | C.used up | D.picked up |
In winter, it is dangerous to go to school with snow ______the ground.
A.cover | B.to cover | C.covering | D.covered |
_______ late you are, we will wait for you to come to have dinner.
A.Whenever | B.Whatever | C.However | D.Wherever |