Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions.
To the naked eye, this silk appears to be smooth, but under the microscope, cultivated silk fiber looks coarse.
A. strong
B. rough
C. stiff
D. refined
Chọn B
Coarse= thô, rough= xù xì, strong= chắc chắn, stiff = cứng, refined= trong, sạch.