It isn't quite_______that he will become well soon.

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It isn't quite_______that he will become well soon.
a.sure
b.certain
为什么B A错在哪了

只能用certain的情形
以下情况通常只用certain,而不用sure：
1.当句中用了形式主语或形式宾语 it 时.如：
It’s certain that he’ll come tomorrow.他明天肯定会来.
I thought it certain that he would be late.我肯定他会迟到.
It’s certain that prices will go up.价格肯定会上涨.
It’s not certain how much it will cost.这要花多少钱还不确定.
2.当表示“某一”“某些”时.如：
A certain Mr Green wants to see you.有个叫格林先生的人想见你.
Certain plants are good to eat but others are not.有些植物好吃,而其他一些则不好吃.
三、只能用sure的情形
在 Be sure (not) to do sth.(一定要或不要做某事)这类祈使句中通常不用 certain.如：
Be sure not to forget it.千万别忘记啦.
Be sure to get there before nine.务必在九点前到达.
Be sure to turn off the light when leave.离开时一定要关灯.

It isn't quite_______that he will become well soon. 英语翻译M:Well,the holiday should soon be here.W:Yes,isn't it ex You [ ] worry about him.He will get well soon.A.needn't B.ca .It isn‘t quite that he will he present at the meeting.　　A.c He isn't feeling very well.（He says） 1.It isn’t quite _____ ______ he will be present at the meet It isn't quite ___ that he will be present at the meeting. 翻译It isn't quite certain that he will be present at meeting. 词汇辨析It isn't quite { }that he will be present at the meeting It hasn't been decided yet whether/if he will come soon这句话的时 you ( ）worry about him.he will get well soon. he isn`t usually like it