英语疑难题1.Goodbye,I'm off now It's the bell.I must be leaving t

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英语疑难题
1.
Goodbye,I'm off now
It's the bell.I must be leaving too.
这里的off换成away行吗?
2.
可数名词前一定要加冠词吗?
3.
They stopped to enjoy the beauties of ____
a nature
b a nature
c natures
d the nature
选哪个?why?

1.不行,away可以做副词和形容词,副词为离开,不在,形容词为客场的意思
所以be away的意思是不在,缺席的意思,表示状态,和be off的离开,走开并不是同一个意思
2.基本上都要加,有时候口语的时候可以省略
但是有加和不加有时候表达的意思会不一样,比如：
They are the teachers of this school.（指全体教师)
They are teachers of this school.(指部分教师)
3.D,冠词the用来修饰nature,大自然的美丽,the beaties of the nature
the splendor of the woods 森林的壮观,由于特指是一个区域或一个地方的森林,或者自然景色,所有要加the

i must be leaving now 求解答ing```1、I'm leaving now ._____you turn off the lignts.A T I'm leaving now ,_______ you turn off the lights A.To make s ---It's getting late .I am afraid I must be off now ----____ _____.I must be leaving now. It's too late.I must be off now.-OK.______ A Go slowly B Sta --It‘s getting late.I'm afraid I must be going now.--OK.____ -It's geting late.I'm afraid I must be going now. -Ok.______ It's geting late.I'm afraid I must be going now --it's getting late.I'm afraid I must be going now. “I really must be off now? I can't hear the bell.It's too n__