请教一些高中非谓语动词的题1.,soIhadtowaitoutformywifeback.ABecausemykeywaslostBMykeywaslostCLosingmykeyDHavinglostmykey(这道题书上给的答案是B.我个人觉得B中的主语是mykey,而且也是一

Question

请教一些高中非谓语动词的题
1.______ ,so I had to wait out for my wife back.
A Because my key was lost
B My key was lost
C Losing my key
D Having lost my key
(这道题书上给的答案是B.我个人觉得B中的主语是my key,而且也是一个完整的句子.我倾向于D,我觉得这好像是一个独立主格,而且后面句子的主语是I,可与前面照应.
2.With his son ＿＿,the old lady felt unhappy.
A to disappoint
B to be disappointed
C disappointing
D being disappointed
（这道题书上答案是C,可我更倾向于D..我认为这是with引导的独立主格结构,with + 主格 + 修饰语,其实我觉得这个句子更为简洁通顺的写法应该是”With his son disappointed,the old lady felt unhappy.”）
3.The new machine,if ____ properly,will work for at least ten years.
A use
B using
C being used
D used
(这道题书上答案是B,我觉得machine和use是被动关系.我觉得是D.)
这是我个人的想法.
我也不确定我说得对不对

Answer 1

B:because和so不能连用,Having lost完成式,表示现在的动作对以后产生影响,如果选他的话,从句就不用so了.C压根就不通顺
C：with的复合结构,用ed还是ing看句子的主语,如果和主语是动宾关系就用ed,如果是主谓关系就用ing,应该算是动名词吧
B:要是按你说的,就应该是being used了.