19 Miguel was so angry at the news that he was unable to concentrate_____ his project.
(A) on
(B) in
(C) of
(D) to

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統計： A(225), B(33), C(25), D(19), E(0) #1526528

詳解 (共 1 筆)

#2683101

concentrate on 專注於某事

concentrate in 集中精力

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