Why does the earth look blue in space?
Because most of the earth's surface ______ by water.( )
A.coversB.is covered
C.coverD.are covered
Did you do _____ during the last summer vacation?( )
something special
special something
anything special
Bob has few friends in his new school, _____?( )
hasn't he
does he
doesn't he
What time is it?
It's half _____ seven.( )
past
to
at
We can't leave here until our teacher _____.( )
will arrive
arrives
arrived
Could you tell me _____?
In Xinhua Bookstore.( )
where you bought the book
where did you buy the book
where do you buy the book