单选题______ whether he will come or not.
单选题Only under special circumstances______to take
单选题The well-maintained facility in San Francisco
单选题The woman over there is none other than______
单选题It is generally thought to be of importance to a
单选题Neither the students nor the teacher______the
单选题If only I______play the guitar as well as you!
单选题I am not a diplomat now, but I______.
单选题Doing your homework is a sure way to improve
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, ______?