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 |
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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 |