题目内容

Ato help
Bhelp
Chelping
D helped

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Aother
Bthe other
Csome
Dany

Aof whom
Bthat
Cwhich
Dof which

Awhom
Bthat
Cwhich
D/

Amany Jack friends
Bmany Jack’s friend
CJack’s many friends
Dmany friends of Jack’s