If you make 　　most of every minute in class day after day, there will be 　　 switch in grades.

A．/; /B．the; aC．/; a D．the; /

B

解析試題分析：考查冠詞。第一空是固定詞組make the most of充分利用；第二空用a表示泛指。句意：如果你充分利用課內(nèi)外的每一分鐘，在分?jǐn)?shù)方面會有一個大的轉(zhuǎn)變。故B正確。
考點：考查冠詞
點評：冠詞的考查一直是重點，特別注意the表示特指和a/an表示泛指的用法。另外也有很多關(guān)于冠詞的固定詞組，在平時的學(xué)習(xí)中加強(qiáng)識記。

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