He has been practicing ___ English for two hours.A.speak b.to speak c.speaking d.spoke
问题描述：
He has been practicing ___ English for two hours.
A.speak b.to speak c.speaking d.spoke
答
C
practise doing sth 固定用法‘ 练习做……
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答
c.speaking
答
He has been practicing （c.speaking） English for two hours.
他已经练习说英语两个钟头了.
practise doing,练习做某事.要用动名词形式来当宾语.