问题
选择题
—Sorry, I have to ________ now. I have a train to catch.
—Goodbye! Wish you a pleasant journey.
A．ring out.
B．call out
C．call on
D．ring off
答案
答案：D
短语辨析。A响起；B大声叫（喊）；叫出去；召唤，请来，调去；C号召；D挂断电话。结合句意可知D正确。句意：对不起我不得不挂断电话了。我要赶火车。