how do you call your mother's mother and your father's mother? in chinese, we have "外婆" that is mother's mother "奶奶"that is father's mother so..what about in english? you all call them grandma? thank you...

when do you use"holiday" and when do you use "vacation"? any differences between these two words? can you give me some examples? thank you.~

are there any differences between "how about you"and"what about you"?

能推荐一些不错的英国影、视作品吗？ 想感受一下英音

how to translate“科技奥运，人文奥运，绿色奥运”into English 高手帮忙翻下啦，突然想到这个问题