'them' or 'theirs'?

[Thang77]

Another question makes me need helping is:'fill in the blank':
''Tom admired his friends Frank and John.He imitated ...................................
A.every their action B.their every action
C.every action of them D.every action of theirs''
In my opinion the answer should be C or B. But opposite to mine,the key is D.Help me please!Thanks in advance!
Be my friends!

[Nanucbe]

It seems you may safely use 'their every action' without attracting any criticism except for exam purposes, where you stick to 'd' for marks.
n

[Giang93]

Hi ,
The answer for this question is D . every action of theirs . Because "every" is not used following to a possessive adjective . This sentence is a usage of possessive adv
i think you should use a good grammar book . It may help you a lot ^-^

[Yankee]