The country has vaccinated 70% of its population since the first vaccines _______ . A. had been produced B. have been produced C. were produced D. are produced

20 23/06/2024

The country has vaccinated 70% of its population since the first vaccines _______ .

A. had been produced

B. have been produced

C. were produced

D. are produced

Trả lời

Giải thích:

Kiến thức về sự phối thì

Cấu trúc với since: HTHT since QKĐ, hoặc Since QKĐ, HTHT.

Tạm dịch: Cả nước đã tiêm vắc xin cho 70% dân số kể từ khi lô vắc-xin đầu tiên được sản xuất.

→ Chọn đáp án C

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Xem tất cả

The country has vaccinated 70% of its population since the first vaccines _______ . A. had been produced B. have been produced C. were produced D. are produced

Trả lời

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