[ Grammar ]
My twin sister is the lady ____________ is talking to Mr. Ma.
A. , who
B. who
C. , that
D. whom

Random Topics:
Grammar: so and suchModals VerbsGrammar and SyntaxModal Verbs for PossibilityThe First Conditional (if/unless)Modal Verbs of Deduction and SpeculationCan/CouldGerund and InfinitiveQuantifierTenses and PronounsOther quiz:
Tenses › ViewPlease don’t interrupt me when I —– to concentrate.
A. was trying
B. had been trying
C. am trying
D. will have tried
Transitive or Intransitive Verbs › View
He read 14 books in one month.
A. transitive
B. intransitive
Reported Speech › View‘What can we do about this?’ We wanted to know …
A. whether we could do about it.
B. what we could do about it.
C. what could we do about it.
Prepositions › View
My parents have been married ______ forty-nine years.
A. since
B. for
C. until