Sam runs_______ of all the boys in his class.（ ）
| A． |
fast |
B． |
faster |
C． |
fastest |
Getting enough sleep is good for _______ health _______ study.
| A．neither; nor | B．both; and |
| C．either; nor | D．neither; or |
— Hey, boy. You can’t cross the street now. You have to wait _______ the traffic lights turn green.
— Oh, sorry and thank you.
| A．when | B．until |
| C．while | D．after |
Mom was cooking ________ Dad was reading newspapers.
| A．as | B．when |
| C．while | D．since |
It’s late. David washes his face _______ goes to bed.
| A．and | B．but |
| C．so | D．or |
（）—Do you believe that paper is made ________ wood?
—Yes, I do. And you can see that books are made ________ paper.
| A．from; from | B．from; of |
| C．of; from | D．of; of |