早教吧 育儿知识 作业答案 考试题库 百科 知识分享

虚拟语气不解句3Theykeeptellingusthatitisvitalthatwethereontime.A.areB.beC.mustbeD.wouldbe请问本题为何选B而不选A?A不也是(should)do的形式吗?

题目详情
虚拟语气不解句3
They keep telling us that it is vital that we __ there on time.
A.are B.be C.must be D.would be
请问本题为何选B而不选A?A不也是(should)do的形式吗?
▼优质解答
答案和解析
should后加原形!be是is are was 的原形啊!所以CHOOSE B