关于英语时态的几道题⒈Everything on the earth ______ all the time.A.is

关于英语时态的几道题
⒈Everything on the earth ______ all the time.
A.is changed B.is changing C.has changed D.has been changed
B ,我自己选的A,这应该是描述的是客观真理,不是应该用一般现在时,所以我选的A,不知道怎么错了,为什么要选择B,
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⒉Elections _____ every four years and Congress meets once a year.
A.are take place B.are to be taken place
C.took place D.take place
D ,我选择的是B .】
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⒊It has been about 7 years since they ____.
A.got married B.got marry
A ,我选择的是B .】
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⒋The book of Fairy Tales I edited ______ soon.
A.is appearing B.is to appear C.is about to appear
B ,我选择的是C,我不知道怎么翻译这个句子,麻烦翻译一下.】
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⒌We ____ our breakfast when an old man came to the door.
A.had just had B.just had
A ,我选择的是B,这句我也不知道怎么翻译.】
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⒍You _____ your books about.
A.constantly leave B.are constantly leaving
B ,我选择的是A,麻烦替我翻译下,】
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⒎I ate the bread yesterday.In any case ,it ____ stale.
A.was going B.had been
A ,我选择的是B,麻烦翻译下,】
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⒏He did not arrive until the meeting was nearly over,for the simple reason that he ____ asleep while watching telecision.
A.had fallen B.fell
B ,我选择的是A,我认为did就表明是过去时了,那么睡觉应该是在过去的过去应该选择过去完成时,所以选择的A,麻烦帮我解答下,】

1.AB都是一般现在时啊,但A是被动语态,everything和change是主动关系,所以选B
2.take place表发生,没有被动,同意的还有happen、come about,都是只能用主动
3.married在这里可看成形容词,get+adj.表示一种状态,意为“他们结婚已经七年了”
4.be about to 即将.句意为 我编辑的书Fairy Tales即将出版.
晕...好多呀,我要吃晚饭去了,后面的等高人来继续解答吧