問題詳情

19. ____ average, human adults contract between two and five colds annually, while children catchas many as six to ten.
(A) On
(B) To
(C) At
(D) With

參考答案

答案：A
難度：簡單0.8
書單：沒有書單，新增

用户評論

【purpleregina】評論

average 的慣用詞:on aver☆☆☆ ★★☆☆ ...