Be careful,________ you'll make fewer mistakes in the exam.( )
A.orB.butC.and
Chongqing has become_____hot city for tourists.( )
a
an
the
/
Dear friends, do you still remember ____ three years ago?
To realize our dream!( )
why you came here
why did you come here
how you came here
how did you came here
He took off his expensive watch ____ the fact that he was rich.( )
to hide
hid
hide
hidden
Nobody worked the math problem out. It was ____ one of all.( )
easier
the easiest
more difficult
the most difficult
His car ____ five years ago, but it looks quite new.( )
buys
bought
is bought
was bought