The device is very sophisticated and should only be operated by someone who is familiar with it.
Giải thích: sophisticated (a): tinh xảo, tinh vi
crude (a): đơn giản, thô kệch advanced (a): cao cấp
makeshift (n): cái thay thế tạm thời archaic (a): cổ, cổ xưa
=> sophisticated >< crude
Tạm dịch: Thiết bị này rất tinh vi và chỉ được vận hành bởi một người quen thuộc với nó.
Đáp án: A
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