15．聽第四段材料，回答第15至17小題． 15．When will the man go to Ying He hotel？ A．The next weekend． B．The next day． C．Seven days later． 16．How much will the man pay for the rooms？ A.40． B.80． C.$160． 17．How will the man pay for it？ A．Pay for it online． B．Pay for it when he comes to the hotel． C．By the message．
