求高人解答几道高中英语语法题(请写下理由，谢谢)

第一道题是现在完成时的句型 it is the first time / second time that sb have done sth.
后斗渗弊面the first time 相当于when 的用法，还有the moment, the minute, the time ,如果是和将来的时间发生动作连用，，要用现在表示将来
第五道题，指在任何没有树的地方， 你可以用 in any place where , wherever,,意思都一样，但是用第一个是定语从句（一定要给它一个修士的名词），第二个是状语从句（不需要名词在前，）
第七题，是典型的通过对话考查省略，so 和 not 通常可以 指代前面一个人讲过的整个一句话，通常放在动词和副词后面用来指代。比如： A: tomorrow will be another fine day,
B: i hope so. = i hope that tomorrow will be another fine day.
第八题，考查名词性从句，你要保证引导词（what, who, if , when ,how 等）在从句开头，剩下的用陈述句语序。另外从句中有一个插入语（ they feel , 当你看到sb feel, sb think, sb consider, 句子还有其他的主干，就是插入语） 比如， you should do what i think you can do. 这个从句已经有了一个主干 You can do , 恰好前面的成分是sb think, guess, suppose ,consider这种类型的，所以就喊源用what 引空族导放从句开头，再 they feel ，由于是插入语，不要用that, 然后直接引导从句。
清楚了吗？？不知道请继续提问，

1,2 同意楼上。
5.The rich top-soil is easily washed away by floods__A___ there are no trees.
A.wherever B.in any place C.in which D.somewhere
C选项是定语从句，那么floods就是先行词，后面从句就成修饰floods，语句不通吧？而A选项是引导地点状语从句，修饰动词is easily washed away，意思是任何没有树的地方泥土就会被冲走
7，C选项是.典型中式思维。一般疑问句回答要先说yes，no。而且疑问句主语是Marry，C选项就成了Marry will possible enter。。。，形容词不能修饰动词enter，所以错。A选项意思是Marry will possibly not enter。。。可能玛丽不能进入演讲比赛。
8.B选项按中文语序这样看好银旦理解，
Sometimes parents want their children to do they feel what they cannot do thenselves
其实they feel 是插入语，可以去掉不看。这就是出题人给考生设的陷阱。
9.虚拟语气，省掉了if从句，如果是一个勇气稍差的人本不会去的。其实前句已经挑明事实去了。
10.答锋神扰案应该是C，可以看形容词副词那章关于倍数问题表达法，
be+ 倍数+as+形容词或副词+as。。。第一个as是副词，后面要放形容词或副词，所以D不对。
11.后半句是虚拟语气的if省略句，原本为if it were not。。。
不过这题貌似有问题，最好的答案应该是but，因为瞎庆but for就是if it were not，更简洁。

1.-----It'll be the first time I ___A__ the subject.
-----Don't worry. It'll be a bit difficult the first time you_____ it.
A.have taught ;teach B.teach ;have taught
C.will teach;will teach D.have taught;will teach
2.English words are not always spelled______B_____.
A.the way they sounding B.the way they sound
C.the way to be sound D.as they are sounding
3.Go where you_______,I___C____accompany you where you want to go.
A.shall;will B.can;shall C.will;will D.may might
4.Franklin discovered ____C____ electricity,which was the regarded as______secret of nature.
A.an;the B.an;/ c./;a D.the;a
5.The rich top-soil is easily washed away by floods__A___ there are no trees.
A.wherever B.in any place C.in which D.somewhere
6.No matter is________ small _____D___escape from his attention.
A.so;to B.too;to C.very to D.so;as to
7.Will Mary enter for the speech contest?
____A_________.
A.Possibly not. B.Not possibly. C.Not possible D.Possible not.
8.Sometimes parents want their children to do ___B___they cannot do thenselves.
A.that they feel B.what they feel C.what they feel that D.they feel what
9.He went to climb the snow mountain alone.A man of less courage____C___ to go.
A.wouldn't dare B.won't dare C.woudn't have dared D.don't dare
10.There were only _____D_____as ten years ago on the hill.
A.as one third trees B.as a third many trees
C.one third trees as many D.a third as many trees
11.Our life would not be so happy_____B____for the Party's policy?
A.if it is B.were it not C.were it if not D.were not it

第一个选A，it is the first time... 后用现在颂纳完成时，通过排除法，排除BC，D前面是将来时，后面不可键闷能又是稿樱弯将来时，应该是一般现在时，所以选A。
2.选B the way省略了一个句子 in which they sound