______ , or you won't do well in your lessons.
OK.I will. ( )
A.Don't work hardB.Work hard
C.Hard work
We're discussing why ______ for our health.( )
are fast food bad
fast foods are bad
fast food is bad
is fast food bad
I'm worried about the air.
______.There might be heavy pollution.( )
Me too
Never mind
Of course
Not yet
It's hard to hold back the tears.This is ______thing I've ever heard.( )
sad
sadder
saddest
the saddest
What tools ______to make paper cutting?
Scissors.( )
are used
used
will use
use
These light bulbs look the same,but their ______ on the environment are different.( )
solutions
methods
effects
secrets