he ordered that the secret message ()to the headquarters at once.
问题描述：
he ordered that the secret message ()to the headquarters at once.
A.is sent B.to be sent C.be sent D.being sent
应该选哪个,理由
答
C
order 后的从句要用虚拟语气【(should)+ 动词原形】,should 省略后,就是C 这个形式了