English teachers are supposed their students a test in class, even after class, better t

English teachers are supposed their students a test in class, even after class, better teaching results.
A. to give; ensuring
B. giving; to ensure
C. to give; to ensure
D. giving; ensuring

A. to give; ensuringB. giving; to ensure(答案→)C. to give; to ensureD. giving; ensuring解析：C　考查非谓语动词的用法。be supposed to do sth.“应该做某事”，排除选项B和D；第二空是动词不定式作目的状语，即“为了确保更好的教学效果”。可知C项正确。

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