問題詳情

二、填入適當的字詞 14% (錯一個字全錯)
1. It is not _______(polite) when people help you and you say nothing. You should thank them _______ (polite).

參考答案

答案:B
難度:適中0.582447
統計:A(36),B(219),C(19),D(90),E(0)

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