问题

Our duty is to ______ their country against bothdomestic and foreign enemies’ attack

A:of whom
B:whose
C:that
D:of which

正确答案是：

同类题型

I’m sorry I went out for a smoke. I was very tired.—There’s no ______ for this while you are at work.

We should be able to ________ enough money for your ticket.

Strangely the story ___ is popular ___ the young.

The thought _____ they could cross the whole continent was exciting

What a beautiful car! When ________ you ________ it — I ________ it for two years.