Question

—John, ______ do you visit your grandparents?—Once a week. A．how long B．how soon C．how

—John, ______ do you visit your grandparents?—Once a week. A．how long B．how soon C．how often D．how much

Answer 1

C

how long多长；how soon多久；how often多久一次；how much多少钱。根据下文，每周一次。可知上文提问频率，故选C。