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.
These machines are older models and have to be operated by hand.
A. manually
B. spiritually
C. automatically
D. mechanically
Đáp án : B
Discourteous = bất lịch sự = impolite; polite = lịch sự