could you lend me your dictionary? Sorry, I left ______ at home.

跟據上面的句子我們可以看出這樣的情景：A向B借字典，B把它忘在家裏了。

a:could you lend me your dictionary?

b:Sorry, I left ______ at home.

由於兩者都知道所談論的事物，故用it代替。

如果這句話是壹個人說的，用MINE恰當。

could you lend me your dictionary? I left mine at home.

可原句比上句多個SORRY,我覺得不是壹個人說的。