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Mark the letter A, B, C or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.
In an ordinary optical microscrope, a electric bulb or sunlight is used as light for the stage.
- A. an
- B. ordinary
- C. a
- D. light
trả lời câu hỏi trước khi xem đáp án bên dướiYOMEDIACâu 1 Đáp án đúng: C
Đáp án đúng là C.
Thay "a" thành "an", vì “electric” bắt đầu bằng nguyên âm /i/.
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