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Mark the letter A, B, C, D on your answer sheet to indicate the answer to each of the following questions. Trả lời câu hỏi dưới đây:When ________ is not known.

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

Câu hỏi

Nhận biết

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

Trả lời câu hỏi dưới đây:

When ________ is not known.


A.
it was invented the wheel    
B.
was the wheel invented 
C.
the invention orthe wheel   
D.
the wheel was invented 
Đáp án đúng: D

Lời giải của Luyện Tập 365

Đáp án là D, Động từ chính trong câu này là “is” ,when + S+ V cũng được coi là mệnh đề danh ngữ, có thể đứng đầu câu làm chủ ngữ, và động từ theo sau ở dạng số ít.

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