﹣It is reported that cancer can be controlled at a temperature lower than 100℃below zero.﹣Really?______ nice surprise!( )
How
What
What a
What an
That's the boy ____ won the first prize in the competition yesterday.( )
who
which
whom
We all look forward to ____ you again soon.( )
see
seeing
seen
Do you know ____ ?( )
how old is he
how old he is
he is how old
My sister ____ be lazy. But now she's working really hard.( )
used to
is used to
was used to
____ will you go back to your hometown?
In a week.( )
How long
How far
How soon