lt is a ruler(改为复数）

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• would you like some pears?--No,thanks.I think there ___ enough for usA.is B.are C,has been D.had beenc是不是应该改为have been因为pears 是复数,B也错了,因为要用完成时态请问,你觉得呢?
• There wasn't a mobil phone on the desk just now.改为复数
• There're ten bags on the tabie(ten划线!对划线部分提问!）______ _____bags____ _____on the table?this is an orange(改为复数句）____are some________ _____is todaytoday is monday(根据问句,完成答句!）
• 1.I have a piece of red paper.(改为否定句)2.Are they under the chair?(作否定回答)3.My notebooks are under the chair.(改为否定句)4.Her key is on the desk.(改为复数句)5.His pencils are in the backpack.(改为一般疑问句,并作否定回答【分两个句子写!】)只限二十分钟,我没那么多时间!还有,我的积分已经不多了,可怜可怜我吧,只有五分啊,不过.对于那些专门学英语的人来说,这些都是小KISS啦!
• the diary wasn't there .(改为复数句)英语分册上的（六年级）
• It's a notebook改为复数句子
• I’m from china 改为复数形式
• this shirt is too short.(改为复数形式)
• This is a shirt .改为复数句
• This shirt is small for him (改为复数意义的句子）
• 积沙成塔的下一句是不是积水成河
• f（x）是定义在（0，+∞）上的减函数，满足f（x）+f（y）=f（xy）． （1）求证：f(x)−f(y)＝f(x/y)； （2）若f（4）=-4，解不等式f(x)−f(1/x−12)≥−12．