– does a CRH train run? –It runs up to more than 300 km an hour. A. How longB. How farC. H

问题补充：

– does a CRH train run? –It runs up to more than 300 km an hour.

A. How long

B. How far

C. How fast

D. How soon

答案：

A. How long

B. How far

(答案→)C. How fast

D. How soon

解析：

试题分析: 句意：中国高铁时速多快？它最高达一小时300多公里。How long多久，How far多远，How fast多快，How soon多久。根据 more than 300 km an hour.一小时300多公里，可知是询问时速，故选C