6.harmful adj.有害的,其反义词为harmless。
It is generally accepted that smoking is harmful to our health.
吸烟有害健康,这是大家公认的。
It's harmful to your eyes to read in the bus.
在公共汽车上看书对你的眼睛有害。
The dog seems fierce,but he's harmless.
这狗看似凶狠,但不伤人。
●用法拓展
harm n.伤害;损害,常构成do harm to...或do sb. harm结构。
vt.伤害;损害
It wouldn't do him any harm to work a bit harder.
工作努力点对他没什么害处。
There was a traffic accident in this street,but no one was harmed.
这街上发生了交通事故,但没有人受伤。即境活用单项填空
If the factories keep on sending off this kind of smoke,great harm will be________to the living things here.
A.made
B.done
C.taken
D.suffered
答案:B
7.puzzle vt.使迷惑;使为难;使窘困 vi.感到迷惑 n.(游戏的)猜谜;难题;谜
What puzzles me is why they didn't show up.
令我百思不解的是他们为什么没有出现。
Her decision was a puzzle to him.
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