为什么take off it不可以,而take off the parcel就可以?

为什么take off it不可以,而take off the parcel就可以? Don't-----off until tomorrow what can be done today?为什么填put?take或者set不可以吗? The flight would take off at 11 o'clock but it wasn't yet nine o'clock ____ Danny arrived at the airport.A.until B.while C.when D.before为什么不可以选A? 选择I Can't find book,Who( took it away)?为什么填它?.而不填did take it away ___ energy,turn off the hot water after you take a shower.save,而为什么不是Save呢,前面不也可以是祈使句吗? It's cold outside. You'd better （ ） your coat A: not take off B: don't take off 选哪个,为什么? Take it off 一般过去时和过去进行时的用法区别The girl[took off]her coat and therw it on the bed这里为什么用took off一般过去时,而不可以用WAS TAKING OFF过去进行时呢? 英语翻译从take good---it off 就可以了. （　）water will make fish in it （ ）为什么是选Polluted,die out 而不可以是Being polluting,die off为什么求解求解求解啊、、、、、、、、、、、、、、、 take it off 为什么it不能放在off之后呀? Take it off的歌词? take it off 谁的 take it off 的意思 How much is the T-shirt I will take it.中为什么答语用take而不用能buy? How much is the T-shirt I will take it.中为什么答语用take而不用能buy _______that time,the reform had begun to take effect,and the economy had begun to take off .中为什么要选择by 而不选择at —when are you leaving?—My plane ___ at 10:30.A.takes off B.took off C.has taken off D.will take—when are you leaving?—My plane ___ at 10:30.A.takes off B.took off C.has taken off D.will take off答案给的是A,但为什么选D不可以?理