[LỜI GIẢI] US scientists claim that they                   a new - Tự Học 365
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US scientists claim that they                   a new

US scientists claim that they                   a new

Câu hỏi

Nhận biết

Mark the letter A, B, C, or D to indicate the correct answer to each of the following questions.

US scientists claim that they                   a new vaccine against malaria.


Đáp án đúng: B

Lời giải của Tự Học 365

Giải chi tiết:

Thì hiện tại hoàn thành diễn tả hành động đã hoàn thành cho tới thời điểm hiện tại mà không đề cập tới nó xảy ra khi nào.

Cấu trúc: S + have/has + P2

Tạm dịch: Các nhà khoa học của Mỹ thông báo rằng họ đã phát triển ra loại vắc xin mới chống lại bệnh sốt rét.

Chọn B

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