﹣﹣﹣ Some school have used smart uniforms. I wonder _____.
﹣﹣﹣ They can tell parents where their children are.( )
A.who invented them
B.what they are used for
C.when students wear them
Go back _____ you come from.( )
why
where
when
how
Do you know ________ the Smiths left Shanghai?
I'm not sure about the date.I only remember it was a Sunday.( )
if
Could you tell me ______ you will come back?
In ten minutes.( )
how soon
how often
how long
how fast
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