There is a knock at the door． It my mom． It's time for her to be back home．（ ）
| A． |
may be |
B． |
may not be |
C． |
must be |
D． |
mustn't be |
____________________？
I need some music CDs．（ ）
| A． |
What's wrong |
B． |
Can I help you |
| C． |
How much are the CDs |
D． |
Are you all right |
Hi， Alice． I wonder ___________．
I often go swimming in the sports center．（ ）
| A． |
where you skate |
| B． |
what you do on the weekend |
| C． |
when you exercise |
| D． |
whether you enjoy your weekend |
Intelligent house furnishings（智能家居） are __________ used in people's homes these days．（ ）
| A． |
widely |
B． |
luckily |
C． |
softly |
D． |
loudly |
She didn't leave the school __________ she worked out this problem．（ ）
| A． |
as long as |
B． |
until |
C． |
since |
D． |
while |
Su Bingtian is the winner of the IAAF World Indoor Tour（国际田联室内巡回赛）
___________________． He is a talented runner．（ ）
| A． |
Without doubt |
B． |
Once in a while |
| C． |
For example |
D． |
All of a sudden |