Question

How often do you exercise? I exercise _______ / w?ns/ a day.

A．won

B．once

C．win

D．one

Answer 1

B

试题分析：句意：你多长时间锻炼一次？我每天锻炼一次。won音标为：[w?n]；once音标为：[w?ns]；win音标为：[w?n]；one音标为：[w?n]。故选B。