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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It is not fair to give such a challenging task to an inexperienced staff like her.
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Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the sentences provided.
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Mark the letter A, B, C, or D on your answer sheet to indicate the word that differs from the other three in the position of the primary stressed syllable in each of the following sentences.
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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We are all very excited about the next camping festival, because we _______ one for nearly 10 years.
He bought her flowers and a diamond ring. This action made her fall in love with him.
