Is that boy Tom?
It ___________ be Tom.He has gone to his hometown to visit his grandparents.( )
can
can't
must
mustn't
I'm going to Yichun for summer vacation. It's a good place to relax.
So it is. !( )
Enjoy oneself
Have a good trip
Thank you
Please read the before you take the medicine.( )
introduction
explanation
instruction
I think the environment is terrible these years.
Yes, it will be even worse the government takes action it.( )
until; protect
unless; to protect
if; protecting
This year is the 49th Earth Day and I think we should people not to too many trees.( )
call on; cut down
call at; cut up
call in; cut off
You throw it away. It can .( )
needn't; recycle
needn't; be recycled
don' t need; be recycled