it happens 是什么意思还有have ones head in the cloud

翻译一下这句话
As it happens, though, there are many different varieties of amylase, and the various types of this.如果能解释一下As it happens, though的语法就更好了

_ it happens,we probably won't have much time for a holiday.
A.As B.Though C.Until D.While
请问为什么呢?

You see the lightning ____ it happens,BUT you hear the thunder later.
A.the instant B.for an instant C.on the instant D.in an instan
看到网上很多人说是A,但是答案是D,为什么选D?
C和D都是立即、马上有什么区别?

新概念四的课文的问题!
As it happens, a razor that is safe in Europe is unlikely to electrocute Americans. So, ask businesses on both sides of the Atlantic, why have two lots of tests where one would do? Politicians agree, in principle, so America and the EU have been trying to reach a deal which would eliminate the need to double-test many products. They hope to finish in time for a trade summit between America and the EU on May 28TH. Although negotiators are optimistic, the details are complex enough that they may be hard-pressed to get a deal at all.
1：中why have two lots of tests where one would do? 为什么有个LOTS OF?是什么意思?
2：课文中为什么都是用WOULD而不是WILL?
The Americans would happily reach one accord on standards for medical devices and them hammer out different pacts covering, say, electronic goods and drug manufacturing. The EU -- following fine continental traditions -- wants agreement on general principles, which could be applied to many types of products and perhaps extended to other countries.
这里面为什么也用WOULD 还有COULD,用一般时态不行吗?

关于it happens that
"It happens that he was in business" The sentence means that___
A.He happened to be on business
B.He happens to have been on business
为什么选B但A不对呢？

You see the lightning _____ it happens,but you hear the thunder later.
(A) for an instant
(B) the instant
(C) on the instant
(D) in an instant

You see the lighting _____it happens ,but you hear the thunder later
A, in an instant B, for an instant
C, the instant D ,on the instant 选择什么

英语翻译
Will the sky fall?The answer is no.But if it happens,there’s no need to be afraid!The American film Chicken Little was shown on November 4,2005.It teaches us:Don’t worry too much in our lives.
One day Chicken Little was walking in the woods when an acorn (橡树果) fell on his head!It made him scared.He thought a piece of the sky was falling!He couldn’t wait to tell anyone else about it.All the people ran for their lives!But when everyone knew what happened later,no one liked Chicken Little.They laughed at him.What’s more,he got a bad name in the town,Oakey Oaks.Chicken Little decided to change others’ opinions about him.He learnt to play baseball.Although he was no bigger than a ball,he practiced very hard!At last,he helped his team win.After that,people began to think he was great.Just then,a spaceship really fell from the sky!The aliens aboard had bad plans.Once again he must tell others about it.
Will he get help from his friends in the town?Please go to watch the film!
What does the American film Chicken Little teach us?
____________________________________________
Where is Chicken Little when an acorn falls on his head?
____________________________________________
Is Chicken Little good at playing baseball?
___________________________________
what really falls from the sky?
_________________________________
TAT如果有大侠回答出
What does everyone in the town call Chicken Little when they learn th truth?
_________________________________________________________
- -上面格式有点错乱 反正就是问题全回答就对了TAT

英语翻译
And i wonder if i ever cross your mind,for me it happens all the time……

How do you ______ a car accident when it happens?

[ ]

A. do about B. do with C. deal with D. deal about

When it happens,you can't see everything clearly.London usually has it in winter.What is it猜猜看

You see the lightening__it happens,but you hear the thunder later.
Aon the instant B for an instant C the instant Din an instant
为什么选B?说下理由.

it happens _____,and there is no delay A.slowly B.quickly C.possibly D.quietly
选择哪个,解释原因并翻译,
it happens _____,and there is no delay
A.slowly B.quickly C.possibly D.quietly