l'm sorry l -- go now.lt's very late.A.must B.can C.need D.should

l'm sorry l -- go now.lt's very late.A.must B.can C.need D.should
l'm sorry l -- go now.lt's very late.A.must B.can C.need D.should

l'm sorry l -- go now.lt's very late.A.must B.can C.need D.should
A 不好意思,我现在必须要走了,很晚了

A
must是必须，因为很晚了，所以必须。而should是应该，对于语意来说，没must合适。

true改成什么 truth：真相