TRAFFIC LIGHTS The first traffic signal was invented by a railway signaling engineer. It was installed

Câu hỏi :

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 33 to 42. Fill in the appropriate word in question 40

A. a

B. in the

C. in a

D. the

* Đáp án

A

* Hướng dẫn giải

Chọn A

Ở đây dùng mạo từ a, với nghĩa là “một” (a year later – một năm sau đó)

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