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

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Vocabulary › Viewto take part in or become involved in an activity
A. character
B. past tense
C. purpose
D. participate
Grammar › View
Whenever I ___ talk to my boss, I get butterflies in my stomach.
a. had to
b. will have to
c. have to
Somebody __________ 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
