Question

The elderly _________ good care of in public places like supermarkets and airports; they are likely to get lost.

A．can have been taken

B．ought to be taking

C．must be taken

D．should take

Answer 1

C

考查情态动词。句意：上了年纪的人必须在公共场合被很好的照顾，像超市和机场，他们很可能会迷路。故选C。