It's too hot.______I swim in the lake?
No, you _______. That's too dangerous!( )
A.Should; can'tB.Need; mustn't
C.Must; needn'tD.Could; can't
Nowadays people wish to have ______ food than before as their life improves.( )
healthy
healthier
healthiest
the healthiest
Alex believes he will soon be able to play chess as ______ as the computer.( )
well
better
best
the best
Did the policeman give much _______ on how to protect personal information?( )
note
tip
advice
book
_______ knowledge and experience are important to finish that task.( )
Either
Neither
None
Both
The headmaster introduced ______ to the German visitors before the welcome party.( )
we
us
our
ours