— What can we do for Ms.Black on Teachers' Day?
— .What about sending her some flowers?( )
A.Better notB.Keep trying
C.Not a big dealD.I have an idea
Look!Someone _______ the classroom.
Well,it wasn't me.I didn't do it.( )
is cleaning
was cleaning
has cleaned
will clean
Did you pass the test?
Yes.I'm very _____ for your advice.( )
thankful
careful
useful
helpful
You can't smoke here.
Sorry,I ______ the sign.( )
don't see
didn't see
haven't seen
won't see
He is not old enough ________ to school.( )
gone
going
went
to go
Can I go swimming,Mom?
Certainly.But you ____ be back by four.( )
can
may
might
must