These exercise -books are ( ).括号是填their还是theirs?

please w_ these words in your exercise book该填什么 exercise-book是什么意思exercise-book是英文 exercise book怎么读 exercise book怎么读? These are their -(book) 对括号部分提问（英语）1.（The exercise book） is under the bag.2.(We) are posting these letters. Please write ---- these sentences ----your exercise books. exercise book,workbook哪个词更地道? Whoes _____(book) are these this ( ) ( book) these(?)( book) this(this ( ) ( book)these(?)( book)this( ) (key)these(?)(key)that(?) (box)those(?)(box) 根据例子改写句子——英语例：This is my cushion.----The cushion is mine.1)ls this her bread?________________________2)ls this exercise book Mary's?__________________________3)These are our vegetable.__________________ Haven't anyone corrected these books yet?这里为什么是haven't而不是hasn't?Anyone haven't corrected these books yet.Someone has corrected these exercise books .错在哪?Anyone hasn't got any book.anyone不定代词能作主语吗?后面的动 How much are these exercise books?(变成单数句) are,there,how,these,books,much,exercise.连词成句 These exercise -books are ( ).括号是填their还是theirs? exercise book,picture,toiletpaper的音标分别是什么 Now write down the new words ___your exercise book. he ----- [hand] in his exercise book in a minute