COLUMBUS...AMERICA MORE THEN 400YEARS AGO. A. DISCOVEREDB. HAS DISC...

3. - TONG HOP BAI TAP TRAC NGHIEM VE CAC THI TRONG TIENG ANH
TONG HOP BAI TAP TRAC NGHIEM VE CAC THI TRONG TIENG ANH

3.

Columbus...America more then 400

years ago. A. discovered

B. has discovered

C. had discovered

D. he has gone