when do we plant trees?could you tell me.两句合并为一句

when do we plant trees?could you tell me.两句合并为一句 when 回答 during请问 when do we plant trees?回答可以用during spring 吗? 正确答案是 in spring when do we when do we when do people often plant trees?改为被动语态 when do peopie usually plant trees?they usually plant trees in（ ）. When Did We Do That when do we happy?意思 when we do homework,we usually write -------- when are we leaving为什么不是when do we leave we plant trees every we plant trees every we plant trees every 英语翻译What'tre you ( )( )do this afternoon? When do you usually plant trees, at night or in the morning? There are some plant in the balcony.I often do some r____there when it is fine When do we have to give______our compositions when do we use capital letter