We ________ see which way to go if the stars do not twinkle(闪耀)so.( )
can not
should not
must not
need not
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
Shall we go to see the documentary Amazing China or stay at home?
Either is OK. ____.( )
Go ahead
It's up to you
That's all right