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

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

A. for
B. since
C. from
D. by

A. of
B. with
C. for
D. on

A. on
B. at
C. in
D. from

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

A. read
B. reads
C. reading
D. was read

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

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

A. walked
B. had walked
C. has been walking
D. had been walking