20 Đề thi giữa học kì 1 môn Tiếng Anh lớp 9 Đề 14

People in the past mainly worked in agriculture (2) today there are significantly less people working in this sector of the economy.

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People in the past mainly worked in agriculture (2)                  today there are significantly less peopleworking in this sector of the economy.

however

therefore

whereas

when

Giải thích

Chọn đáp án C