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.
One reason birds have been so successful is because of their able to escape from danger very quickly.
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It is not fair to give such a challenging task to an inexperienced staff like her.
If you insist in going against their orders, you must be prepared to face the consequences.
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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.
"Ken, stop playing with the knife, or else you'll get hurt," said the mother.
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 that differs from the other three in the position of the primary stressed syllable in each of the following sentences.
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They report that some passengers suffered from minor injuries in the Vietjet flight incident last week.
Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions.
The bag was heavy. We couldn't take it with us.
