What does the sign mean？
It tells us____________in public．（ ）
A．didn't smokeB．don't smoke
C．not to smokeD．not smoke
Fresh water ________ more important than anything else．（ ）
is
are
was
were
﹣Are your grandparents both Americans？
﹣No._____ my grandfather is an American and my grandmother is a Chinese.
Recently
Finally
Actually
Is this the museum you visited last year？
where
that
in which
﹣ This is a photo of our family.Would you like to see it？
﹣ Wow! happy family!
What a
How a
What
There is no light on，they _______ be at home.
mustn't
can't
needn't
mean？ mean？
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