Two yeas ago, a terrible tsunami _____ most of the India Ocean areaand parts of the Pacific Ocean.A.hit B. strike 答案为 hit，如果把 strike 改为过去式 struck，答案可以选 strike 么？hit 与strike在表示自然灾害袭击某地时有何区别？谢谢！
Around 13,500 new jobs were created during the period, _______ the expected number of 12,000 held by market analysts.A. having exceeded B. to exceed C. exceeded ...
...应该丢了一把钥匙（指在过去），如果英语就是I should have lost a key.但是为什么不可以直接用should呢感觉也可以，亦或者我可能丢了一个钥匙（指在过去），I might/may/could have lost a key.但是却不能直接使用might should could，
还有一...
Having been shown around the lab,we were led into a big hall.可否改为Shown around the lab,we were led into a big hall.having finished the work, they went home.可否改为the work finished,they went home.如果可以这么改，这种变换是一般规律吗？
It is obviuos how the capacity to visualize objects and to finger out numerical patterns suits one to answer question that have eluded some of best poets and phliosophers请问: to answer question, 做什么成分。one 又是指代什么。谢谢老师!
Competition for these jobs is very severe—we have five times as many applicants as we did last year. 中文原句：谋求这些职位的竞争很激烈，今年的求职者是去年的五倍。1. 此句competition 前面为何不需要定冠词 the？2. Competition for： 介词 for 表示...
Specifically, the authors found that the modern erais unique in the extent to which creatures with larger body sizes are being preferentially targeted for extinction.请问为什么是to which,而不是for which？
...个小问题，请老师解惑：1. The other reason why costs
are so high is the restrictive guild-like ownership structure of the
business.一般看到的句子都是关系词作主宾表语或者时间状语、地点状语，但这里从句costs are so high在意思上很完整了，关系词到...
It's no pleasure looking through these any longer because nature isone
thing that really must be experienced.问：此句中句型“It's +n.+doing sth.”,有没有“It's +n.+to do
sth.”的句型？另外在此句型中什么时候该用doing sth 作句子主语，而什么时候又该用to do ...
... the rule for reciporcationand the sense of obligation that _____ with it is its pervasiveness in human culture.这里为什么只能填 goes, 而不能填 accompanies，不都是表示伴随吗？我查了 accompanies 的释意 to happen or appear with something else，不知道为什么不可能...