________ careful when we start a fire.

1. A.
   Be
2. B.
   Are
3. C.
   Were
4. D.
   Will be

________ careful!

1. A.
   Do
2. B.
   Be
3. C.
   Not be
4. D.
   Not do

________ careful girl Kate is!

1. A.
   How
2. B.
   What
3. C.
   What a
4. D.
   How a

_______ careful you are, ________ mistakes you will make.

A. The more, the more　　　　　　　 B. The less, the fewer

C. The more, the fewer　　　　　　　 D. The less, the fewer