________ on ten years of observation and study, Professor Wang announced that everyone dreams every night,whether they realize it or not.
The chairman thought necessary to invite Professor Smith to speak at the meeting .
—There is still a copy of the book in the library. Wall you go and borrow ________? —No, I’d rather buy ________ in the bookstore.
The information on the Internet gets around much more rapidly than ____ in the newspaper.
To save class time, our teacher has ________ students do half of the exercise in class and complete the other half for homework. .
The little boy often has____ big breakfast,so he looks really strong. A.the B./ C.a D an