Most of us enjoy __________to our mothers speak， because our brains greatly prefer the voices of our own mothers．（ ）
A．listeningB．listenC．to listen
The policeman warned us________ the busy street when the traffic lights are red．（ ）
| A． |
don't cross |
B． |
not crossing |
| C． |
not to cross |
D． |
can't cross |
The doctor was busy ______on the woman at that time．（ ）
| A． |
operate |
B． |
operating |
C． |
to operate |
D． |
operated |
My necklace is not the only thing is missing．（ ）
| A． |
/ |
B． |
which |
C． |
who |
D． |
that |
Maria's brother eats too much sweet food．________．（ ）
| A． |
So does he |
B． |
So he does |
C． |
So he is |
D． |
So is he |
The river near our village is about long．（ ）
| A． |
three﹣hundreds﹣meters |
| B． |
three﹣hundred﹣meter |
| C． |
three﹣hundred﹣meters |
| D． |
three hundred meters |