Must I come before 6：30 tomorrow？
No， You______． There will be plenty of time．（ ）
| A． |
mustn't |
B． |
can't |
C． |
couldn't |
D． |
needn't |
Katie is_____of the three girls in her family.（ ）
| A． |
young |
B． |
younger |
| C． |
the younger |
D． |
the youngest |
Our classroom won't be clean _____we clean it every day.（ ）
| A． |
after |
B． |
while |
C． |
unless |
D． |
because |
You'd better get up_____，or you will miss the train.（ ）
| A． |
early |
B． |
slowly |
C． |
quietly |
D． |
carefully |
Nowadays，_____birds fly to the warm south in winter.（ ）
| A． |
million |
B． |
millions |
| C． |
two millions |
D． |
millions of |
﹣Dad，I'm afraid I can't do well in my math test tomorrow.
﹣Don't worry.Believe in_____.（ ）
| A． |
you |
B． |
your |
C． |
yours |
D． |
yourself |