Did you say anything to your parents ____ they shouted at you？
No，I was afraid to talk back．They looked really serious and scary（ ）
| A． |
unless |
B． |
why |
C． |
when |
The headmaster warns us _____________ the school rules，or we'll be punished．（ ）
| A． |
don't break |
B． |
to break |
| C． |
not to break |
D． |
breaking |
We used to _____________ in the evening，but now we are used to _____________ early in the morning．（ ）
| A． |
exercising； exercise |
B． |
exercise； exercise |
| C． |
exercise； exercising |
D． |
exercised； exercise |
-Could you please tell me _____________？
-At 8：00 p．m．（ ）
| A． |
when the train will leave |
| B． |
where will the train go |
| C． |
where the train will go |
| D． |
when will the train leave |
Thanks to our teachers．_____________ their help，we couldn't make such great progress．（ ）
| A． |
For |
B． |
Without |
C． |
With |
D． |
About |
-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 |