How did the accident happen was difficult to find out because there were few people on the street at that time.

　　很难查明这起事故是如何发生的，因为那时街上几乎没人。

　　(2)动词need, want, require作“需要”讲时，后跟动名词的主动形式表示被动意义，也可跟不定式的被动结构；be worth后也用动名词的主动形式表示被动意义。

　　The figures need to be checked/checking again before we draw a conclusion.

　　在我们得出结论前，这些数据需要再检查一遍。

　　[典题在线]

　　Ⅰ.单句语法填空

　　1．(2015·全国卷Ⅰ语法填空)Abercrombie & Kent, a travel company in Hong Kong, says it

　　regularly

　　arranges quick getaways here for people living (live) in Shanghai and Hong Kong.

　　2．(2015·全国卷Ⅱ语法填空)The adobe dwellings (土坯房) built (build)

　　by the Pueblo Indians of the American Southwest are admired by even

　　the

　　most modern of architects and engineers.

　　3．(2015·全国卷Ⅱ语法填空)In addition to their simple beauty, what makes the adobe dwellings admirable is their ability to “air condition” a house without using (use) electric equipment.

　　4．(2015·全国卷Ⅱ语法填空)When a new day breaks, the walls have given up their heat and are now cold enough to_cool (cool) the house during the hot day.

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