You should make a careful plan ___ the experiment.
| A．before to do | B．before doing | C．after to do | D．after doing |
—There is still a copy of the book in the library. Wall you go and borrow ________?
—No, I’d rather buy ________ in the bookstore.
| A．it;one | B．one;one | C．one;it | D．it;it |
The information on the Internet gets around much more rapidly than ____ in the newspaper.
| A．it | B．those | C．one | D．that |
To save class time, our teacher has ________ students do half of the exercise in class and complete the other half for homework. .
| A．us | B．we | C．our | D．ours |
The little boy often has____ big breakfast，so he looks really strong.
A．the B．／ C．a D an
October l st is___ National Day of ____ People’s Republic of china.
A．a；the B．／；／ C．／；the D the；／