These trees were planted last year.变成否定句They weren't planted last year.为什么these trees 要用they

These trees were few and far between.中文是什么? These trees were planted last year.变成否定句They weren't planted last year.为什么these trees 要用they These trees are 什么 high the trees 和these trees有什么区别? These trees were thick last year.(一般疑问句＼肯定＼否定回答)改一般疑问句＼肯定＼否定回答 These are apple trees(改为单数句) 求These are trees的中文, They were cutting trees变被动语态 there were lots of little trees There were apple trees,orange trees and pear trees.(改为否定句) lots of trees were cut down and some kinds of trees () A.were disappeared B.disapeared ---- the PLA,they were saved and sent to the saety in floods. As many members ----were present agreed to the pla. A who Bthat C which Das There __(be)a telephone call for you five mintues ago如题..填空写什么?These trees in our school ________ten years oldA.were planted B.are planted C.planted D.was planted We must water these young trees ofen.(改为被动语态) we must plant these trees 改成一般疑问句 Many trees _____(plant)in our school yard these years. Are these apple trees?（的否定答句）