I don't know______, but I'm loosing some plants each year, most of them during the winter months. A.what is this disease B.what was this disease C.what this disease was D.what this disease is
A.A.what B.what C.what D.what
【参考答案】
D 解析:这句话的意思是说,我不知道这是什么病,但每年都会有些植物死亡,大部分都是在冬季的那几个月里。what引......