English teachers are supposed ______their students a test in class, even after class, ______better teaching results.
A．to give; ensuringB．giving; to ensure
C．to give; to ensureD．giving; ensuring
C

試題分析：考查不定式的用法：第一空填不定式，be supposed to do應(yīng)該做…,第二空填不定式，是做目的狀語，句意：為了確保教學效果，英語老師應(yīng)該在課堂給學生進行測驗，甚至在下課的時候。選C。
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