Question

Nobody agreed to the plan,___? A does he .B doesn't he C did they D don't they

Answer 1

C did they

这是考查反意疑问句,其原则是: 前肯后否,前否后肯.

此句陈述部分含有Nobody,说明是否定句,因此后面应用肯定式反问.

且Nobody ,somebody,anybody ,everybody作主语时,应用 they反问.

再看陈述部分的谓动agreed是一般过去时,因此应用助动词did反问.

综合以上几点,故答案选C.

Answer 2

C did they
从时态考虑，只有C正确。