Question

【题目】—_____________ has Hong Kong been back to our motherland?
—For 20 years. How time flies!
A.How soon
B.How long
C.How often

Answer 1

【答案】B
【解析】句意：——香港回归祖国有多久了？——有20年了，时间过得真快啊！how soon多快；多久；how long多久；how often多久一次；根据回答for 20 years可知选B。