the best time to visit china is…… 这里为什么要加to

the best time to watch the best time to do 翻译 When is the best time to When`the best time to visit chinese? the best time + to do 还是 doing when is the best time to go to Beijing? when is the best time to go to harbin是什么意思 when is the best time to go to sanya? Fall is the best time to go to Beijing是什么意思 when is the best time to go to sanya?why? When is the best time to go to Sanya? 7．_____is the best time to go to Canada? Time is the best medicine to cure the wound. the best time to go there is winter.winter is the best time to go thereIt's the best time to go there in winter.都对吗 Time is the best what is the ( ) time for the children ( )the film A best,to see B best ,seeing When is the best time to enjoy red leaves? Now is the best time to be happy 求翻译!