You must ________ English in English class．Please ________ it ________．A.talk; tell, ChineseB.speak; say, in EnglishC.say; speak, EnglishD.says; speaks, Japanese
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B解析句意为“英语课上必须说英语，请用英语说”．情态动词must后用动词原形；speak作及物动词时后接语言，“讲”某种语言；say作及物动词，“说话”，强主调说的内容；talk强调与人“谈话；交谈”；tell意为“告诉”．根据句意，选B．