I’mafraidwe’llhavetoworkextrahours,forsomeproblemsareha...

問題詳情：

I’m afraid we’ll have to work extra hours, for some problems are hard　　　.

A. to settle                            B. settled

C. to be settled                        D. settle

【回答】

【解析】選A。考查動詞不定式。某些形容詞(pleasant, nice, comfortable, difficult, hard, easy等)後接動詞不定式時, 常用主動形式表示被動意義。

知識點：非謂語動詞

題型：選擇題