ALEXANDER GRAHAM BELL ……….. THE TELEPHONE BY THE TIME I WAS BORN....

282. - 2000 CAU TRAC NGHIEM ANH A B C
2000 CAU TRAC NGHIEM ANH A B C

282. Alexander Graham Bell ……….. the telephone by the time I was born.

a. had already invented

b. has already finished

c. already finished

d. already finish

 a