A. have
B. had
C. has
D. was
A. study
B. studies
C. studied
D. studying
A. am
B. is
C. are
D. was
A. go
B. went
C. going
D. gone
A. has
B. have
C. had
D. was
A. is
B. are
C. was
D. were
A. have
B. has
C. is having
D. had
A. go
B. goes
C. going
D. gone
A. were
B. was
C. are
D. be
A. give
B. gave
C. gives
D. giving