单选题I was to have made a speech if______.
单选题The student said there were a few points in the
单选题Nowhere in nature is aluminum found free, owing
单选题The sun heats the earth, ______is very important
单选题I have no objection______your story again.
单选题I am surprised______this city is a dull place to
单选题I have heard both teachers and
单选题I'm sorry I can't see you immediately; but if
单选题Our modern civilization must not be thought of
单选题We're safer in a train than we would be if
单选题I'm very keen of hearing, ______?
单选题______plastics, the machine is light in weight.
单选题______for the fact that she broke her leg, she
单选题By the end of the year all but two people ______.
单选题We left the meeting, there obviously______no
单选题Have you ever been in a situation ______ you
单选题The people at the party were worried about Mary
单选题All this leads to a population in the
单选题Things might have been much worse if the
单选题The gray building is where the workers live, and