—Ruby, when did your father go out?
—I’m not sure, but he ______ go too far. His tea is still hot.
can’t
must
might
We often take a taxi to go there.
He is of medium build.
I spent five yuan on this pen. =" I" spent five yuan buying this pen.
Why don’t you come and have a look?
Mike likes to watch the birds _________ in the sky.