The students in the classroom ______ not to make so much noise.

The students in the classroom ______ not to make so much noise.
A、need
B、ought
C、must
D、dare
【正确答案】：B
【题目解析】：只有ought 才可以与to 搭配,表示“应该”的意思.
need和dare作实义动词时也可以和to搭配,但它们作实义动词时不用于肯定句