题干
—_____________ has Hong Kong been back to our motherland?
—For 20 years. How time flies!
A：How soon
B：How long
C：How often
答案(点此获取答案解析）
B
—_____________ has Hong Kong been back to our motherland?
—For 20 years. How time flies!
A：How soon
B：How long
C：How often
