---- is it?
----It’s about thirty minutes’ bus ride.
A. How far
B. How long
C. How often
D. How soon
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(答案→)A. How far
B. How long
C. How often
D. How soon
解析：A. How far 多远，询问距离 B. How long 多长时间， C. How often 多久一次，表示频率 D. How soon多久，用于一般将来时态中；句意：有多远？乘公共汽车大约三十分钟。故选A