4道英语选择的问题

1 It is impossible to ( ) a conversation with all this noise in the background.
A carry on B go on C put on D move on
(答案是A.为什么不能是B呢??意思应该一样啊>

2 Oh,dear,I forgot the air tickets.
You ( ) something
A have left B are always leaving C are leaving D always left(答案是B.为什么用进行时???)

3 Why?Tom,your shirt is so dirty!
Mum, I ( )my storeroom downstairs.
A cleaned B have cleaned C was cleaning D have been cleaning(答案是c,为什么这里要用过去进行时??不用a???)

4 I have won a holiday for two days to Florida.I ( )my mum
A am taking B have taken C take D will have taken (答案是A,take是趋向动词??我怎么不记得有?)

你的问题问得好 都是高考题 有水平 咱回答你！保证全对！
1.carry on和go on 虽然都有“继续”的意思 但carry on 可以用作及物动词 go on不能这样用 通俗地说：carry on后可以跟名词作宾语 go on不能。

2.本题考查的是现在进行时的一个用法：现在进行时和频度副词连用 表示经常发生的事，但带有说话人的感情色彩 经常为厌恶 不满的情绪。典型的用法是：be always doing 因此 本句中不能用一般现在时 因为一般现在时只表示经常发生 但没有感情色彩 在给你举一例：
You _______ things about. Look , what a mess in your room!
(2003北京西城二模)
A. always throw B. have always thrown
C. are always throwing D. have always been throwing
该题答案C 不是A。

3.你的答案肯定错了 答案应该是D。本题考查现在完成进行时的一个用法：动作发生在过去 说话时刚刚结束 但动作造成的结果明显存在于现在。
Why?Tom,your shirt is so dirty!就表明
I have been cleaning my storeroom downstairs.的结果明显存在于现在 因为他妈都看出来了 能不明显吗？！再举一例 说明你的答案是错的：
---Hi , Tracy , you look tired.
---I am tired. I ______the living room all day . (1998全国)
A. painted B. had painted
C. have been painting D. have painted
该题和你的题在语法上完全一样 答案C 高考题不可能错