German physicist Wilhelm Roentgen _____ X-rays while he _____ a routine experiment involving cathode rays.
Giải bởi Vietjack
Kiến thức: Thì quá khứ tiếp diễn – quá khứ đơn
Giải thích:
Quá khứ tiếp diễn được dùng để diễn tả một hành động đang diễn ra trong quá khứ (was/ were V-ing) thì bị một hành động khác xen vào (Ved/V2).
Cấu trúc: S + Ved/V2 + while + S + was/were + V-ing
Tạm dịch: Nhà vật lý người Đức, Wilhelm Roentgen đã khám phá ra tia X-quang trong khi ông đang thực hiện một thí nghiệm thông thường liên quan đến tia catốt.
Chọn A
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 sentences.
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Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following sentences.
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Mark the letter A, B, C, or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions.
They report that some passengers suffered from minor injuries in the Vietjet flight incident last week.
