The ways ( ) air-conditioners work to "clean" the air can in

（英语翻译）我们最好考虑一下减少污染的方法.We ___ ___ ___ ___ the ways ___ ___ pollution.

根据汉语提示完成句子。 1. 我朋友想出的办法非常奏效。 The ways my friend with ______. 2. 她已经花光了钱。 She has ______ money. 3. 你昨天花了多长时间看篮球比赛？ How long ______ it ______ you to watch the basketball match yesterday? 4. 我们每年都向我们学校的贫困生捐款。 We ______ some money the poor students in our school every year. 5. 他张贴了告示收集旧电池。 He some signs old batteries.

有一道英语选择题,有点看不懂,
The ways _____ ari-conditioners work to "clean" the air can cause health problems.
A:which B:that c:in which D:in that
但我认为也可以选B,因为The way 后面有三种接法 in which ;
that 和”不接“三种形式.