我修改一下
1.翻译一下就明白了,意思是请把那本封面是红色的书给我,那么book和cover其实是所属关系,那么是可以用whose的,跟有没有生命无关,也可以用of which,两者都对,要是cover前面加了the,就只能用of which
2.这里在从句中,还原的形式是i will never forgot the day ,i first came to beijing (in the day).那么放在从句中就是in which i first came to beijing.所以这里用in which和when都可以
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