A. is
B. was
C. were
D. be
A. do
B. does
C. are doing
D. did
A. have
B. has
C. had
D. was
A. sing
B. sings
C. is singing
D. sang
A. are
B. was
C. were
D. be
A. work
B. worked
C. works
D. working
A. buy
B. buys
C. bought
D. have bought
A. do
B. does
C. did
D. was
A. likes
B. like
C. liked
D. liking
A. is having
B. has
C. had
D. having