He isn't at school today.I think he _____be willA.canB.shallC.mustD.should选哪个?为什么?不好意思,是be ill
问题描述：
He isn't at school today.I think he _____be will
A.can
B.shall
C.must
D.should
选哪个?为什么?
不好意思,是be ill
答
d
答
C
答
C.must
是BE句
答
选C，一定是！！！！！
答
must be句型
一定是
答
must
答
D!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!