请教opening period / basic date / order start date想请教一下有关几个日期关系的问题：basic date,opening date,order start date ,order finish date间的关系.能否举个例子,在下不胜感谢.

请教opening period / basic date / order start date想请教一下有关几个日期关系的问题：basic date,opening date,order start date ,order finish date间的关系.能否举个例子,在下不胜感谢. Opening period 请教一个英语选择题Please excuse me ( )your letter by mistake.A.to open B.to have opened C.for opening D.in opening这个题为什么选C :70B:presentation period 是啥意思! That restaurant () 24 hours a day A.open B.opening C.is opening D.is open listen!I hear someone__the door A.is opening B.open C.opening D.to open Would you mind ______the windows?A.to open B.my opening C.mine opening D.Iopen i don't mind____the door.A.you open B.your openC.your opening D.yours opening 在计算机发展阶段,哪个阶段是最长的时期 In a computer,which of the following is the longest period?A）Beat period B）Machine period C）Instruction period D）CPU period Hongkong has a lot of places of interest and_.A.open space B.opening spacesA.open space B.opening spaces C.open spaces D.opening space The zoo was not （ ）yesterday.A.open B.opening The shops are____.A.opening B.closing C.far Do you mind( ) the windows?A.my opening B.me opening C.both A and B是不是C才对 请教这题选哪个?Some of the rubbish ,such as wood ,paper and iron,＿away over...请教这题选哪个?Some of the rubbish ,such as wood ,paper and iron,＿away over a long period of time.A.rot B.are rotted C.is rotting D.rots Why not keep your mouth___and your eyes___?A.closing;opening B.close;open C.closed;opening D.closed;open The store ________at 8:00 in the morning.A opens B was opening C has opened D is opening 请教高手：...during the period that he or she is contagious句中为什么用用“when”行不行?