When is the best time....用完整句子回答能不能用It当代词替代the best time

Time is the best When is the best time to When is the best time to go there 与What is the best time意思相同 when is the best time to go to sanya?why? when is the best time to go to Beijing? when is the best time to go to sanya? when is the best time to go to harbin是什么意思 When is the best time to enjoy red leaves? when is the best time to go to Harbin?why? when does john think it is the best time to go t When`the best time to visit chinese? the to when best is time to Beijing go 怎么连成一个句子?