问题
选择题
Don’t keep silence! The head teacher is ___________a lot about that.
A．able to know
B．supposed to know
C．supposing to know
D．going to know
答案
答案：B
题目分析：be able to do sth能，能够做某事；be supposed to do sth应该做某事；be going to do sth打算做某事；句意：不要沉默。关于那件事，校长应该知道很多。结合语境可知选B。
