单项选择题 It is said that the best time to visit the city is June or July, （） the South American winter cools the city.

单项选择题 大学生只有正确地理解()的内涵，明是非、辨善恶、知荣辱，才能在实践中最大限度地创造人生的价值，成就人生的辉煌。

未知题型 The retired man is used to ________ his two dogs early in the morning.