bài 1 . chọn đáp án đúng
1. Sir Alexander Fleming was the___ of the telephone.
A. creator B. explorer C. founder
2. He works as a software ____, writing programmes for IBM .
A. explorer B. engineer C.developer
3.As a/ an__________, he works on reactions in laboratoris
A. chemist B. engineer C. archeologist
4. The environmental_____met to discuss ways to deal with sea pollution.
A. doctors B.conservationists C. developers