THE UNIVERSITY SCIENTIST ………. DID RESEARCH IN THE AMAZON RIVER BASI...

5. - BO DE THI TRAC NGHIEM NGU PHAP TA ON THI 10
BO DE THI TRAC NGHIEM NGU PHAP TA ON THI 10
5. The university scientist ………. did research in the Amazon River basin found many previously unknown species of plants.a. whom b. which c. whose d. who