__--These boxes are too heavy for me to carry.I 'll give you a hand __ them.( of ,to ,for ,by)该选那一个

These are boxes. (改为单数句） These are pencils-boxes哪里错了? what are there in these boxes? __--These boxes are too heavy for me to carry.I 'll give you a hand __ them.( of ,to ,for ,by)该选那一个 these,books,are,and,those,boxes,are 连词成句 Are these her pencil boxes?(改为同义句) Are_______pencli boxes_________? These boxes are brown.变单数求了快 These boxes are ours.(氦为单数形式) These boxes are ours氦为单数形式 This is a box.(改为复数句）是These are boxes.还是These are many boxes. these boxes are too heavy.how about the light --- a.one b.ones c.the boxes 为什么 .These boxes are very heavy ___.A.be carried B.carry C.carried D.be carrying 改疑问句：my favorite color is blue sally is 11 years oid these are small boxes these lunch boxes are (theirs).括号里的theirs划线提问. all these small boxes race 一What are ( )in English?一They are (一What are ( )in English?一They are ( ).A.these；boxesB.these；boxC.this；boxes Are these __ (you) pencil yes,they are ____( our ) ---What're these? ---( ) A.They're boxes. B.These're boxes C.It's boxes