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10．You should have told her about the meaning of the gesture．
I meant ______，but I had some unexpected guests．（　　）

A．

B．

to have

C．

to do so

D．

doing so

分析 ---你本該告訴她關于這個手勢的意思．
--我本打算告訴她的，但是我來了一些不速之客．

解答答案：B 考查動詞不定式．mean to do 打算做某事；mean doing sth 意味著．本題應是：I meant to have told her，為了避免重復，要省略不定式，保留to，但后后接不定完成式時，要保留to have．故選B．

點評不定式具有動詞的特征，同時也有名詞、形容詞和副詞的特征．動詞不定式在句中可以作主語、賓語、表語、定語和狀語，還可用在復合結構中，而且有完成式、進行式、完成進行式和否定形式．弄清楚不定式的各種表達形式的含義和在句中所作的成分，然后選擇最符合題意的選項．

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