1._____her mother had come,her face lit up.

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1._____her mother had come,her face lit up.
A.Hearing
B.Having heard
C.When hearing
D.When she heard
2.Will those __________the children from abroad come to the headmaster's office?
A.teaching
B.teach
C.who teaches
D.who teaching
3.His letter,_____ to the wrong number,reached me late
A.having been addressed
B.to have addressed
C.to have been addressed
D.being addressed

1.选D
hearing的逻辑主语应该是后面主句中的主语,但是主句中的主语是her face,显然不合逻辑,所以排除A和C；B项用了完成时态,但是道理也是同上,就是 her face 不可能 having heard.只有选项D,使用一个有主谓宾的完整从句,最符合题意.
2.选A
这句的谓语是come,所填部分应该是个定语成分,修饰 those,所以作为动词原形的teach不可选,排除；又因为those是复数性质,who后面不应该使用单数第三人称形式,故C也排除；至于D,那就是很明显的错误,即不是从句,也不是分词结构,也排除.而A就是现在分词做后置定语.
3.选A
这里应该用被动语态,所以B排除；不定式表示一种即将发生的动作,所以C亦排除；D项是用了现在进行时,不合题意,所以排除,如果只是 addressed,也可以算对.只有A项使用现在完成时,表示一种“地址已经被搞错”的状态,最符合语法和题意.
再问：第二题，如果 C选项是who teach 可以选不？
再答： who teach就是正确的了。

1._____her mother had come,her face lit up. _____her mother had come,her face lit up. _her mother and come,her face lit up Her face lit up with Joy中 lit 是什么词性?light作为动词的用法是什么? she had made up her face ,rearranged her hair . Jenny had to _____her voice ______when her child was sleepin my mother would sit up with a furious expression on her face 这句话前半句有没有错?Hearing her mother had come,she was happy. My mother,（）whether anyone would come home to help her,had (1/2)By the time she got up,her mother had gone to work.对gon by the time she got up,her mother (had gone work)就括号中的部分提问 She often helps her mother with supper.she often _____her mo