Whose are these?----They are______ books.A.teacher B.teacher

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Whose are these?----They are______ books.A.teacher B.teachers' C.teacher's

首先teacher是要用复数形式,且所有格形式所有要选B 前面的these说的就是夫说后面的BOOK说明前面的词要选名词的所有格形式所以选B
再问：为什么teacher 要用复数？感觉C也对呢
再答： teacher是指单个老师，前面的these就说名了这个老师不是一个人，且teacher是可数名词，所以才用teachers,然后后面根据语意要求所以才用所有格形式故选B

Whose are these?----They are______ books.A.teacher B.teacher —Are these the students` books? --Yes,they are______ A.their whose books are these?They're t______ These books are my _____.A.teachers B.teacher's C.teachers' Are these ( ) books?A:they B :them whose books are those next to the teacher's book?they are al 帮帮忙吧whose books are these?They are not_,but_. 英语Whose autivity books ( are ) these?They are the (students‘ are these student's books orthe teacher's books Whose books are these?They belong to _____(we) These students_____to the teacher. A are listen B listen all A:Whose ___ are these?B:These coats are too big for me.They'