问题补充:
He insisted that the doctor at once.
A. be sent for
B. was sent for
C. was going to be sent for
D. must be sent for
答案:
(答案→)A. be sent for
B. was sent for
C. was going to be sent for
D. must be sent for
解析:考查insist用于虚拟语气的用法:insist表示坚持要求的时候,后面从句接虚拟语气:(should) do,但是如果是表示坚持说,就不用虚拟语气,而是陈述语气,句意:他坚持要求派人请医生。因为the doctor和send for是被动关系,用be sent for,省略了should。