A. is
B. was
C. has
D. were
A. has
B. have
C. had
D. was
A. is polishing
B. polished
C. polishes
D. polish
A. go
B. went
C. was going
D. gone
A. is
B. are
C. was
D. were
A. teach
B. teaches
C. taught
D. teaching
A. goes
B. go
C. went
D. gone
A. has
B. have
C. had
D. was
A. tries
B. try
C. tried
D. trying
A. is
B. are
C. was
D. were