when _ you_(buy) it?是否用现在完成时

when _ you_(buy) it?是否用现在完成时 when you_ _ _3个空,you_ _两个空cross it at a zebra crossing. I_(buy) a beautiful pen.----when _ you_(buy) it?填过去时是错的、我填的就是过去式、 老师说是错的、 你确定你喜欢它吗?根据汉语意思写中文 _ you _that you_ it? Can I help you _,_I want a pair of shoes.What_do you_.Black.Here _ _._ _are you I'll buy them ._you.you 're_.一个空填一个单词 一,根据括号内所给汉语提示填写单词1.You_(应该)sayplease.It's polite2.My dog is the _(最聪明的)animal of all3.He barks when somebody_(按) the doorbell4.His blue and green_(羽毛) look so beautiful in the sun5.Don't _(吓唬)th _(be) careless any more or you_(make) mistakes _(not eat)snacks while you_(do)your homework when three know it,all know >_ Why not buy the coat?It’s really _. When _____ you ______ (buy) this computer It looks smart When this book____,nobody wanted to buy it. 英文题天空_ _ seven in _ _.Excuse me,Jack._ the _.please?Let_have_look.Oh!_four o'clock thank you_ _.改变成祈使句You must come here.Please go there(not)You mustn't write on it.You will sit there. It is important for you_(practise)_English more often. which is black when you buy it,red when you use it,and gray when you throw it away?猜一猜: Which is biack when you buy it,red when you use it,and gray when you throw it away which is black when you buy it,red when you use it,and gray when you throw it away? Which is biack when you buy it,red when you use it,and gray when you throw it away