it is said that the best time to visit Australia is in June or July,the winter cools the city
问题描述：
it is said that the best time to visit Australia is in June or July,the winter cools the city
A.where B.which C.on which D.when
答
选D修饰前面的June or July,六月或七月,时间
听说去澳大利亚的最佳时间是6月或7月,那是的冬天让城市凉爽.