Trắc nghiệm ôn tập
Engineers_____ the finished bionic contact lenses on rabbits for up to twenty minutes.
Câu hỏi:
Engineers_____ the finished bionic contact lenses on rabbits for up to twenty minutes.
A.
have yet tested
B.
have already tested
C.
have performed
D.
have done
Đáp án đúng: A
Đăng bởi: Monica.vn
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