为什么第四行after后不用which?

您好，很高兴回答您的问题

定语从句中使用that的情况:

1.当先行词是nothing, something, anything, all, each等不定代词时。

例如. Do you have anything that is important to tell me?

2.当先行词被all, any, some, no, not, every, each等修饰时。

例如. l have some books that are very good.

3.当先行词被形容词最高级、序数词所修饰时。

例如. This is the first book that l bought myself.

The biggest bird that l caught is this bird.

本句句干先行词出现了every day，故此处应使用“that”

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