---- You should be _______ careful when you take the chemistry exam.
---- I agree. In this way, I will make _______ mistakes.
| A．more; less | B．more; more |
| C．more; fewer | D．less; fewer |
The flowers smell ______.
A. well B. badly C. good
Mrs. Smith has _____ son and a daughter.
A. a B. an C. the
Bob is _________ than John.
A. tall B. taller C. tallest
—What are _______ teachers doing?
—They are having a meeting.
A. this B. that C. those
There are a lot _____ students on the playground.
A. of B. in C. by