-Daddy，can you come home for supper with us this weekend？
-________，but I might be a little late．
| A． |
I'm busy |
B． |
Hard to say |
| C． |
Of course |
D． |
never mind |
— 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 |
Guangdong is ____ the south of China .
| A．in | B．on |
| C．to | D．with |