Câu hỏi:

19/08/2022 280

Pure sodium immediately combines with oxygen when is exposed to air.

A. immediately

B. combines  

C. is exposed  

D. to air

Đáp án chính xác

Trả lời:

verified Giải bởi Vietjack

Kiến thức: Cấu trúc câu

Giải thích:

Với các mệnh đề chứa liên từ thời gian (when, after, before, while,…) mang nghĩa bị động thì có thể rút gọn câu bằng cách bỏ chủ ngữ và chuyển động từ sang dạng quá khứ phân từ (P2). Chú ý: chỉ áp dụng với 2 mệnh đề cùng chủ ngữ

is exposed => exposed

Tạm dịch: Natri tinh khiết ngay lập tức kết hợp với oxy khi tiếp xúc với không khí.

Đáp án: D

CÂU HỎI HOT CÙNG CHỦ ĐỀ

Câu 1:

The news of the flood in Central provinces were broadcast over radio and television as well as published in the newspaper.

Xem đáp án » 19/08/2022 5,804

Câu 2:

The president, with his wife and daughter, are returning from a brief vacation at Sun Valley in order to attend a press conference this afternoon.

Xem đáp án » 19/08/2022 3,201

Câu 3:

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 questions

       New sources of energy have been looking for as the number of fossil fuels continues  to decrease.

Xem đáp án » 19/08/2022 1,014

Câu 4:

In a restaurant, if we want to call the waiter, we can raise our hand and wave it slight to signal that we need assistance.

Xem đáp án » 19/08/2022 664

Câu 5:

I am now in my attempt winning a place at the same university to my brother.

Xem đáp án » 19/08/2022 581

Câu 6:

He was quite amusing when he heard what happened.

Xem đáp án » 19/08/2022 578

Câu 7:

There are such many planets in the universe that we cannot count them.

Xem đáp án » 19/08/2022 573

Câu 8:

Her weigh has increased remarkably since she began receiving treatment.

Xem đáp án » 19/08/2022 496

Câu 9:

We always have believed that honesty is the best policy in personal as well as professional matters.

Xem đáp án » 19/08/2022 389

Câu 10:

Historically, it was the 3rd Asian Games in Japan that tennis, volleyball, table tennis and hockey were added.

Xem đáp án » 19/08/2022 342

Câu 11:

I saw the blind man crossed the busy road without any help.

Xem đáp án » 19/08/2022 332

Câu 12:

Geothermal energy is energy to obtain by using heat from the Earth’s interior.

Xem đáp án » 19/08/2022 329

Câu 13:

The nitrogen makes up over 78 percent of the Earth’s atmosphere, the gaseous mass surrounding the planet.

Xem đáp án » 19/08/2022 314

Câu 14:

A lot of athletic and non-athletic extracurricular activities are available in Vietnamese high-schools, either public and private.

Xem đáp án » 19/08/2022 287

Câu 15:

Owing to their superior skill, highly competitive athletes have been known to win contests and break records even when suffered from injuries, physical disorders, and infections.

Xem đáp án » 19/08/2022 276