These are some notebooks in my backpack改为单数

these are 后面要加some吗?如these are some books还是these are books just some 例句：Here are just some of these operations. 帮我做几道英语小题一、改句子中的错误1 This pair of pants are 50 yuan.2 Pleaes have a look these new clothes.3 This eraser is 1 yuan,and that eraser is 2 yuans.4 Does Alice likes strawberry ice cream?5 The nice yellow and green noteb There are some dictionaries in these bags?(单数形式) I need there are some () between these two books.(区别) These are some stamps from Canada.怎么改成疑问句 These _____ some milk and fish.are还是is 把These are some desks.改成一般疑问句 These are some old photos.改为单数句 these are some keys in classroom e7改为否定句 These are some notebooks in my backpack改为单数 These are some jeeps and T____ are some cars.(填空)空里面应该填什么? These are some stamps from England就some stamps from England提问急,划线部分提问 Are these -Are these books interesting?-No.( ) of them are interes ting.A Few B Some C Several These're some books （are） in it.要加are吗? These are some stamps from Canada.They are famous men and women. these are some candies ,very nice.You are bond to enjoy it.这句话怎么翻译?