Question

1.I have often heard the"ABC song"____,but I have never hear？

Answer 1

1.我经常听到ABC歌,但我从来没听Alice唱过.第一空,是听到歌被唱,所以要用过去分词sung；第二空,hear *** do/doing sth.听到某人做某事,do强调结果,doing强调过程,题中指我从没听过这件事,并不强调过程,故用原型.
2.解决问题的关键是满足顾客的需求.the key to sth.……的关键,这里的to是介词,其后的动词要加ing,demand 要求,要求与顾客是被动关系,所以用made.
3.happen是不及物动词,选A就表被动（不会是表过去,因为was caused才是谓语）,这是不对的.B which happened 作定语.
4.第一个that修饰前面的all,作定语,第二个that与前面的so匹配,表示如此……以至于……：妈妈对bill所做的一切是如此生气以至于她出去了.
5.convenient指“方便的,便利的”,不能用来修饰人,只能是一件事（对于某人）是方便的,所以选C
6.It was/is ……that……是一个强调句句型,第一个省略号是被强调部分.整句话意思是“看了那部电影以后那些罪犯才意识到遵守法律是多么重要”（强调看完电影之后）所以选B,3,3.The accident__yesterday was caused by carelessness.
A.happened B.which happened
这个句子是定语从句，which引导的定语从句，在从句中which要做成分（主语不能省）
4.Mother was so angry at all____Bill was doing __she walked o...,1,楼上两个回答的都很好啊。在下长见识了。但是对于第三题，单从语感的角度讲，两个好像都没错。
楼上两位对第三题有两种说法。在下认为“主动被动”说不可取。My teacher, who is also my dad, teaches me chemistry.这句话总没错吧，期中who在重句中是主语，没有什么不可以啊。
还有需要注意的是。英语中99.99%的情况下，convenient都...,1,1.I have often heard the"ABC song"____,but I have never heard Alice___it.
A.sung;sing B.sang;singing
A
2.The key__the problem is to meet the demand___by the customers.
A.to solving ,made B.to solve,making
A
3.The accident__yesterday was caused by carelessness.
A.happened B.which happened
B
4.Mother was so angry at all____Bill was doing __she walked out.
A.that,that B.which,what
A
5.e and see me whenever___.
A.you are convenient B.you will be convenient
C.it is convenient to you
C
6.It ___that the prisoners realized how important to obey the law.
A.after they saw the film
B.was after they saw the film
B
要详解.特别是3—6题.