英语题
是今年高考题哦```全国2的 If the weather had been better,we could have had a picnic.But it _______ all day. A rained B rains C has rained D is raining 答案是A,我语法学的不好````帮我讲讲吧```
rained 因为所给的句型： If sb./sth. had done..., sb./sth would/could/should have done...是虚拟语气，表示对过去的陈述，与过去事实相反。因为实际情况应为一般过去时。
答：解：当x²-3x≥0时,即0≥x 或 x≥3时 不等式化为x²-3x-4>0,解得x>4 或 x0,无解. 所以x>4 或 x<-1详情>>
答：B 被动语态，be found to do. A中的made与found均为过去分词，冲突！详情>>
问：hArd work 和hArd--working有什么区别
答：一个是名词 一个是形容词撒详情>>
