A. teach
B. teaches
C. taught
D. teaching

A. have
B. has
C. had
D. was

A. does
B. do
C. did
D. done

A. do
B. does
C. did
D. will

A. leave
B. leaves
C. left
D. leaving

A. has
B. have
C. had
D. was

A. walk
B. walks
C. walked
D. walking

A. finish
B. finished
C. have finished
D. had finished

A. go
B. goes
C. went
D. gone

A. is
B. was
C. were
D. be