Must I come before 6:30 tomorrow?
No, You______. There will be plenty of time.( )
mustn't
can't
couldn't
needn't
Could you please help me wash the car, Tony?
____.I'm studying for my coming English test now.( )
That's right
I'm sorry
It doesn't matter
Not at all
Dad,____ can we reach Huangguoshu Waterfall?
In about an hour.( )
how long
how soon
how often
how far
Paper ____ first ____ about two thousand years ago in China by Cai Lun.( )
A.is; inventingB.is; invented
C.has; inventedD.was; invented
____ noise pollution, and we can live in a quiet environment.( )
Prevent
Preventing
Prevented
To prevent
Your new watch is so nice! When did you buy it?
In October. I ____ it for two months.( )
had
bought
have had
have bought