英语选择题一道，高手请进！！

Question

我又来问了，不好意思！！
____________I attended the meeting instead of him last Monday.
A He was ill
B His being ill
C Him being ill
D He being ill
答案我倾向于选B，但我的同学们都说选D才对，为什么

Answer 1

选d
这是独立主格的语法知识
当一句话有两个不同的主语时---此句中是he和I，就只能把两个不同谓语---此句中是was(being的原型)和attended中的其中一个变成非谓语（因为一句话中只能有一个谓语），由于本句侧重的意思在后半句I attended the meeting instead of him last Monday所以就把前面的谓语was改成非谓语being的形式了，意思不变
也就是说本句改变之前的复杂情况是He was ill,so I attended the meeting instead of him last Monday.
详细的知识请参照语法书

Answer 2

其实偶也选B

Answer 3

上面说的很对

Answer 4

____________I attended the meeting instead of him last Monday.
A He was ill
B His being ill
C Him being ill
D He being ill
选d
这是独立主格的语法知识
当一句话有两个不同的主语时---此句中是he和I，就只能把两个不同谓语---此句中是is(being的原型)和attended中的其中一个变成非谓语（因为一句话中只能有一个谓语），由于本句侧重的意思在后半句I attended the meeting instead of him last Monday所以就把前面的谓语is改称非谓语being的形式了，意思不变
也就是说本句改变之前的复杂情况是He was ill,so I attended the meeting instead of him last Monday.