How ()do you watch TV?A:much,b:ofter,c:usually ,d:many.
问题描述：
How ()do you watch TV?A:much,b:ofter,c:usually ,d:many.
答
how often 多久一次；how much 询问价钱或不可数名词的量；how many 询问可数名词的量；how usually这种说法本身是错误的；正确答案：how often
答
B often
你多久看一次电视？提问频率
答
b:often
答
c:usually
你多久看一次电视