what is difference what choose, how about the case ・eat and have ・cook and made ・work and job and business ・recently and lately ・listen and hear ・see and look and watch ・aren't you..?(don't you...?) and ...,aren't you?(..., don't you?) ・would you... and could you... and will you... and can you... ・let me... and may I ...and can I... and shall I... ・let's... and why don't we... and shall we... ・should and had better and why don't you