Question

－________ keep water running when you are brushing your teeth or washing your hands, Jack． －OK．I know we must save every drop(滴)of water． [　　] A． Why not B． Please C． Don't

Answer 1

答案：C
解析：

考查祈使句的否定形式。第一句句意：杰克，当你 刷牙或洗手时不要让水不停地流淌。祈使句的否定形式在句首加don't，故选C。