《2025年系统集成新课程同步导学练测高中英语必修第二册》

6. occasion n. 特殊场合，盛会；时刻；时机
【归纳拓展】
on this/that occasion 此时/彼时
on the present occasion 在这次
on one occasion=once 有一次
on occasion(s) 偶尔
have no occasion to do sth. 没有理由做某事
occasional adj. 偶尔的，特殊场合的
occasionally adv. 偶尔
On one occasion， she called me in the middle of the night.
有一次她深更半夜打电话给我。
I've had no occasion to visit him recently.
我最近无缘去拜访他。
I've met him on several occasions.
我曾见过他几次。
The doctor does not mind my eating a little meat on occasions.
医生并不介意我偶尔吃一点肉。
【温馨提示】
occasion 作先行词且关系词在定语从句中作时间状语时，定语从句用 when 引导。
【活学活用】
单句语法填空
①Occasions are quite rare when I have the time to spend a day with my kids.
②As he works in a remote area， he visits his parents only occasionally (occasion).
③Today is a historic occasion (occasion) for our country.

答案： ①when ②occasionally ③occasion

7. in the air 可感觉到；在传播中
【归纳拓展】
by air 乘飞机
on/off the air(电视、广播)正在/停止播送
out of thin air 凭空；无中生有地
up in the air 悬而未决
put on airs 摆架子
clear the air 缓解紧张状态，改善气氛
There was great excitement in the air.
人们都感到无比激动。
Our plans are up in the air.
我们的计划还悬而未决。
There are rumors in the air.
谣言传开了。
What's on the air this evening?
今晚的广播内容是什么？
I hate the way she puts on airs.
我不喜欢她那装腔作势的样子。
【活学活用】
根据汉语意思完成句子
①我们的旅行计划尚未决定。
Our travel plans are still ____________________.
②她总是摆架子，以期给新结识的人留下印象。
She puts on airs all the time to try to impress new acquaintances.
③他突然凭空地出现；我既没看到也没听到他进来。
He had materialized out of thin air； I had not seen or heard him coming.

答案： ①up in the air ②puts on airs ③out of thin air