我想問以下字的解釋,快!(10分)

to reply
n.答复, 報复, 答辯
vi.答复, 回擊, 報复, 答辯
vt.回答
(原告對被告)答辯
reply to a question

to sigh
n.嘆息, 嘆息聲
vi.嘆息, 嘆气

celebrate
v.慶祝, 祝賀, 表揚, 贊美, 舉行

to exchange
vt.交換, 調換, 兌換, 交流, 交易
n.交換, 調換, 兌換, 交流, 交易
to exchange contracts
交換合同
to exchange words
口角
to exchange blows

to decorate
脫水

repay
v.償還, 報答, 報复

to reply 答覆
I did not know what to reply.
我不知道怎麼回答好。

to sigh 嘆氣
We heard her sigh with relief.
我們聽到她寬慰地歎了一口氣。

to celebrate 慶祝
We held a party to celebrate our success.
我們舉行宴會慶祝我們的成功。

to exchange 交換;調換;兌換
I'd like to exchange some pounds for dollars.
我想把一些英鎊兌換成美金。

to decorate 裝飾,修飾[(+with)]
The great hall was decorated with flowers.
大廳裡裝飾著花朵。

to repay 償還
I'll repay you all the money you lent me next week.
我下週還你借給我的所有的錢。