英语问题We ____________ (begin) work at 9 o'clock but we never d

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英语问题
We ____________ (begin) work at 9 o'clock but we never do.
A.should begin B.should have begun
How to choose,translate and why? Thanks.

选A.
我们本该9点开始工作,但我们从来没有这样.
这个讲的是通常的情况,每天都这样,而不只是昨天.因为如果是昨天的事,那么就改写成We should have begun work at 9 o'clock but we never did.

I begin work at nine o'clock和I begin to work at nine o'clock at / work / start / nine o'clock / we / .with / have / my / we ( ) there at 9:00 o`clock we begin our classes at (eight o'clock),对括号提问 We begin our classes at eight o'clock in the moring 是什么意思?急! We start work at nine o’clock.（对画线部分提问）画线部分是at nine o’clock. we will meet at 9 o'clock(对at 9 o'clock提问) we will meet at 9 o'clock(对at 9 o'clock提问) ·``~`````~ It is eight o,clock .We begin _____(have)classes. Today,we have Chinese at 8 o'clock.We have maths at 9 o'cloc We have (l ) at 12o' clock 完成英语对话-When shall we meet.-How about at 9 o'clock tomorrow m