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이번 문제는 좀 쉬운거 같습니다.
1. Pheromones are substances that serve as chemical signals between members of the same species.
The word “serve” is closest in meaning to which of following?
(A) improve (B) function (C) begin (D) rely
2. Pheromones are the predominant medium of communication among insects (but rarely the sole method) . Some species have simple pheromone systems and produce only a few pheromones, but others produce many with various functions.
The word “sole” is closest in meaning to which of following?
(A) obvious (B) best (C) only (D) final
3. Some species, such as ants, seem to be very articulate creatures, but their medium of communication is difficult for humans to study and appreciate because of our own olfactory insensitivity and the technological difficulties in detecting and analyzing there pheromones.
The word ” detecting ” is closest in meaning to which of following?
(A) controlling (B) storing (C) questioning (D) finding