1．Now we’ve got a foot in the door；we are hoping to ________ a big market in China.
A．open up B．open out
C．open into D．open by
2．—It is a long time ________ we last met.
—Yes，and it will be a long time ________ we meet again.
A．that；until B．since；before
C．when；that D．before；since
