PRACTICE TEST 6- Đại từ nhân xưng, Đại từ sở hữu và Đại từ phản thân
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They _______ and _______ a lot of money before they _______ last year. A. are working / saving / will retire B. have worked / have saved / would retire C. were working / saved / have retire

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They _______ and _______ a lot of money before they _______ last year.

are working / saving / will retire

have worked / have saved / would retire

were working / saved / have retired

had worked / saved / retired

Giải thích

Chọn đáp án D