less, than
the happiest
spend less time chatting
much lighter
at most
楼上的第四题even 是甚至的意思，不是程度副词，用在这里不对。第二题最高级表达不对。
less than 比...少
most happily 最高兴
spend less time chatting
even lighter
at most
1、 less; than
2、the； happiest
3、spend; less; time; chatting
4、more ;lightly
5、at; most
1.less, as
2.most happily
3.spend less time
4.more quietly
5.at most
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