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Câu II: Mark the letter A,B,C, or D on your answer sheet to indicate the correct answer to each of the following questions. Trả lời câu hỏi dưới đây:__________, 70 percent alcohol is more effective than 100 percent alcohol.  

Câu II:
Mark the letter A,B,C, or D on your answer sheet to indicate the correct answer

Câu hỏi

Nhận biết

Câu II:

Mark the letter A,B,C, or D on your answer sheet to indicate the correct answer to each of the following questions.

Trả lời câu hỏi dưới đây:

__________, 70 percent alcohol is more effective than 100 percent alcohol.  


A.
How an antiseptic is used
B.
An antiseptic used
C.
When used as an antiseptic 
D.
An antiseptic when used
Đáp án đúng: C

Lời giải của Luyện Tập 365

Đáp án là C. Câu này hỏi về cách rút gọn mệnh đề trạng ngữ “when +S +V….”. Khi hai vế có chung chủ ngữ, ta có thể rút gọn chủ ngữ ở vế trạng ngữ, và hình thức động từ sẽ biến đổi.

Với dạng chủ động: When + V- ing. Với dạng bị động:  When  + PII

Vì chủ ngữ  alcohol ( chất cồn ) là danh từ chỉ vật => câu chia ở dạng bị động.

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