I think we have solved this problem once and for all.

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Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions.

I think we have solved this problem once and for all.

forever

incompletely

temporarily

in the end

Giải thích

Chọn B.

Đáp án B.

Ta có: once and for all (ngay lập tức hoàn thành) >< incompletely (chưa hoàn thành)

Các đáp án khác:

A. forever: vĩnh viễn

C. temporarily: tạm thời

D. in the end: cuối cùng