___,we should be glad.We haven't seen them for a long time.
A.Were they to arrive tomorrow B.They were to arrive tomorrow C.They would arrive tomorrow D.They arrive tomorrow 选A.为什么?
虚拟语气和倒装。从句中可知，意思是对将来的事实可能相反，应用虚拟语气，可说“If they were to arrive tomorrow”，连词if省略时，条件从句中的were需与主句倒装，将were提到句首。选A
答：I haven't heard from you for a long time. How's everything going?详情>>
问：已知a,b属于R,求证:a^2+b^2>=a*b+a+b-1
答：答案如下： 由（a-1)^2+(b-1)^2>=0 得到a^2+b^2+2>=2(a+b)--------(1) 又由(a+1)^2+(b+1)^2>=2(a+...详情>>
问：“ prefer to...rather than ”是一个词组吗？
答：prefer to do rather than do sth 与其作后者的事情的不如做前者去事情。 可以等同于= prefer to do instead o...详情>>
