--- The fog is so thick that the express way ____ have been closed. --- You are right. I ____ have thought of that. Now we have to take another road.
—Will you join us in the game? —Thank you, ______.
—Can I speak to Mr. Wang, please? —______.
—Excuse me, could you tell me the way to the British Museum? —Sorry, I’m a stranger here. —______.
—I’m sorry to have kept you waiting. —______, Bill.
—Shall I give you a ride as you live so far away? —Thank you. ______.