网址：http://m.1010jiajiao.com/timu_id_1698759[举报]
－Is this Mr．Black's office, Lucy?
－Yes, ________．
A．that's all right
B．it doesn't matter
C．after you
D．please yourself
—Is this Mr. Black’s office, Lucy?
—Yes, _______.
A．that’s all right B．it doesn’t matter
C．after you D．please yourself