they have/were planted last year.哪个正确以及区别.

they were ( )because they didn 't havethey were ( )because they didn 't have lunch have,plant的过去式 they have/were planted last year.哪个正确以及区别. they have no idea at all how busy we were Cars have p________a lot of accidents since they were invented mike,chen jie and sarah each plant a flower on the same day.four weeks laker,their plant are different.today they have science lesson. I think they were Canadian.I don't think they were.They can't have been Canadian.They must have been Australian.帮我看看有无语法错误 They___tired so they stopped___a rest.A.are,have B.were,have C.were,to have D.are,having were后动词是否要用ing:是they were have还是having? They could have let me know they were going to be late!翻译 They were very tired.they stoped__(work)__(have)a rest. “他们曾计划明年再去植树”英语怎样表达?可不可以说：They were going to plant trees again next year. 恐龙是什么动物?they were plant eaters or meat eaters?他们是食草动物或是食肉动物?他们是食草动物或是食肉动物. 英语改为被动语态（下面是特殊疑问句）急1.Where were we going to plant some trees the next year 2.Where would we plant some trees the next year 3.Where should we plant trees in spring 4.Where do we have to plant trees in spring They were sure that they were going to ____ a rest.They were sure that they were going to ____ a rest.A.be B.have C.be on D.on They------(plant) some trees last year. They u什么 plant 什么 in March. What did they do?该怎么回答是They were have a dinner.还是They had a dinner.