[ Grammar ]
I ………a letter at the moment.
A. write
B. writes
C. writing
D. am writing

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Grammar › ViewSomebody __________ taken the document without my permission.
A. has
B. have
C. was
D. were
Grammar › View
The really happy people are those ………… enjoy their daily work.
A. what
B. who
C. which
D. whom
