at 后面加什么時間

　　The weather is very changeable at this time of year.

　　年年在這個時候天氣都變化無常。

　　Almost all homes have at least one TV set.

　　差不多每家都至少有一臺電視機(jī)。

　　I was still in short trousers at the time.

　　我那時還在穿著短褲呢。

　　Both their children are at university.

　　他們的兩個孩子都在上大學(xué)。

　　He met his future wife at law school.

　　他在法學(xué)院結(jié)識了他未來的妻子。