&：Try as he might ,he failed.为什么要用try as这种形式阿?

not only 后面接的应该是but also.不是but only.
该表达的意思是“不但……而且……”,注意以下用法：
■主要用于连接两个对等的成分；若连接两个成分作主语,其后谓语动词与靠近的主语保持一致.如：
She likes not only music but also sport.她不但喜欢音乐而且喜欢运动.
The place was not only cold,but also damp.那个地方不但很冷而且很潮湿.
We go there not only in winter,but also in summer.我们不仅冬天去那儿,而且夏天也去.
Not only the students but also their teacher is enjoying the film.不仅学生们在欣赏这部影片,他们的老师也在欣赏这部影片.
■not only…but also…中的also通常可以省略,或换成too,as well（要置于句末）.如：
He not only washed the car,but polished it too [as well].他不仅冲洗汽车,而且还擦拭了它.
有时甚至连 but also 一并省略掉.如：
Justice must not only be done; it must be seen to be done.正义不但必须伸张,而且要让人看到正义得到了伸张.
She not only entered the competition—she actually won it!她不但参加了竞赛——而且居然获胜了!
■为了强调,可将not only置于句首,此时其后的句子通常要用部分倒装的形式.如：
Not only has she been late three times,she has also done no work.她不仅仅迟到了3次,她还没干一点活.
Not only do they need clothing,but they are also short of water.他们不但需要衣服,而且还缺水.

选in
fail in 是一个固定搭配,意思是：失败
整句意思是：
他在尝试登山的时候失败了.

B

so many……that
他犯了太多错误以至于他fail了

选择C,尽管他很努力,但最终失败了.even if 和 although都是连词,后面连接的是句子,而in spite of 是介词短语后面可以跟名词.

l. his final exam2. take the test3. pass the test 4. be strict with

fail to do 失败；未做成
to face

选yet,相当于but,然而的意思

Exam 是 Examination 的缩写,在书写上,通常不能如此书写,尤其在正统书面上
当然,口头上是可以的
Instead 之前有一条横线,那是空格还是...?

to get

没有逻辑问题,请看下面朗文词典的解释:
2x05used to say what is done,when you have just said that a particular thing is not done:
例句：Geoff didn't study law.Instead,he decided to become an actor.
如果前后表示相反意思应该是用 instead of:
Instead of being annoyed,he seemed quite pleased.