問題詳情

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

參考答案

答案：A
難度：簡單0.777778
統計：A(49),B(5),C(1),D(2),E(0)

用户評論

【Standhal Wen】評論

concentrate on 專注於某事concentrate in 集中精力