单项选择题
A.often B.once C.seldom D.usually
We are going to have a singing party tonight. Would you...
单项选择题We are going to have a singing party tonight. Would you like to join us?（）
A.I'm afraid not, because I have to go to an important meeting. B.Of course not. I have no idea. C.No, I can't. D.That's all set.
We are glad that we finally managed to get into contact...
单项选择题We are glad that we finally managed to get into contact（）them.
A.at B.on C.from D.with
We are disappointed to find that the quality of the pro...
单项选择题We are disappointed to find that the quality of the products here（）very poor.
A.to be B.have been C.is D.being
