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

These exercise -books are ( ).括号是填their还是theirs? 就括号里提问.These books are (theirs) where are ___ bags? 横线上填their还是theirs These are my books.where are____?A.their B.theirs C.my D.you these books are theirs.同义句 These books are theirs. 的同义句 Are these ---- a.yours books b.books theirs 填疑问词 _____ books are there?Theirs. 中文意思：are these their suitcases?yes,they are theirs. These Chinese books are theirs.的同意句 these english books are theirs.改为同义句 改为同义句：these chinese books are theirs.