they are some difficult math problems.改为单数句 ____ ____ difficult math problems.

填入介词 They are some _____my friends. They are doing some reading.改为一般现在时 They are doing some very important ( ) (work) They are showing some picture ___ us. they are some apples 改单数：---------- ------------- --------------- Some of (they)are from China. They are doing some English _(练习). some animals die because they are 什么, They are some frogs.变为单数句 would like some h( They are nice They are some pens,some books but cards 小弟有几道英文难题.麻烦帮帮忙.The pears are hard for me to reach them.这段话有什么错..填空.The sign 空 beautiful.(限一个词)Many beats are 空 the lake.选择They are 空 little children that they can't work out 空diffic Some things are like that...They are just lost. what are __ the door?-- they are some brooms. some p_____ are on the dresser they are green 是They are some water还是They are some water英语中不可数名词前面是用are还是用is?如：They are some water/They are some water 1,.there are some tall______（build）in front of the post office2.she_____（copy）my homework every day3.they______（not have）any classes next week -you loook so sad today.4.i ______（argue）with my girlfriend last night5.i found it diffic We can see them in summer.They are small.They are rough.They are red.There are some black dots on ththem.Some are sweet and some are sour.People like to eat them very much.They are_______.