(Viên chức Mầm non) 600 câu trắc nghiệm Trọng tâm tiếng Anh có đáp án - Phần 31

New machines ______used on this farm now. A. have B. are being C. being D. was

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New machines ______used on this farm now. 

have

are being

being

was

Giải thích

Đáp án B