Swallows help keep cattle in barns healthier by ___________. eating infected skin

Câu hỏi :

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 36 to 42.

A. eating infected skin  

B. consuming insects 

C. singing  

D. making cows happier

* Đáp án

B

* Hướng dẫn giải

Đáp án B

Chịm én giúp giữ cho gia súc trong chuồng khỏe mạnh hơn bằng cách

A. ăn da bị nhiễm bệnh

B. ăn côn trùng

C. hót

D. làm cho những con quạ vui vẻ hơn

Dẫn chứng: As well, swallows feed on insects that can cause infections in cattle. Thus, a farmer who has many swallows in his barn may actually have healthier animals on his farm

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