how time flies!()more than ten years since i left my hometown.为什么填it is ,而不是there are；will you mend the cleaner yourself()shall we ask some one else to fix it?and;but;or;so.应该选择哪一个?求理由第二个句子的意思是什么？
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在这 it is 用来表时间、距离等
it is two miles from my home to school.
it is five minutes on foot from the store to the bank.
or 或者表选择
你要自己修还是请别人修?