这里最好用as,不用which

有读者问: 有这样一句话:

(1)He made up his mind quickly, as was his nature.

这里可用which替代as吗?

这里用as最好,因为as强调与主句和谐一致,再如:

(2)She has married again, as seemed natural.

如用which,则强调给以新的信息,如:

(3)He married her, which was unexpected.