1.--Are you sure there are UFOS?--- Sorry.I'm not sure( )tha

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1.--Are you sure there are UFOS?--- Sorry.I'm not sure( )that
A.to B.at C.of D.in
2.His joke made us ( )up and down.
A.to laugh B.laugh C.laughing D.laughed
3.People use robots for ( )
A.do boring work B.do boring works C.doing boring work D.to do boring jobs
4.My parents will go to Beijing ( )
A.three days ago B arter three days C in three days D.before three days
5.Are you sure ( )he lives?
A.where B.which C.what D.when
6.You have to do it in a diffrent way ( ) a diffrent situation.
A.on B.in C,for D.at

1.--Are you sure there are UFOS?--- Sorry.I'm not sure( of )that
A.to B.at C.of D.in
be sure of something.确信某事,固定搭配
2.His joke made us ( laugh )up and down.
A.to laugh B.laugh C.laughing D.laughed
make somebody do (something).使某人做某事,固定搭配
3.People use robots for ( doing boring work )
A.do boring work B.do boring works C.doing boring work D.to do boring jobs
be used for + 名词(动名词)
4.My parents will go to Beijing ( in three days )
A.three days ago B arter three days C in three days D.before three days
在3天内去北京,will do sth.in +时间段一般将来式的固定用法
5.Are you sure ( where )he lives?
A.where B.which C.what D.when
你确定他住在哪吗?其他都解释不通.
6.You have to do it in a diffrent way ( in ) a diffrent situation.
A.on B.in C,for D.at
in situation,固定短语

1.--Are you sure there are UFOS?--- Sorry.I'm not sure( )tha 1.I'm not sure how old are you?2.I'm not sure how old you ar i'm m___ you are right,but iam not sure. I‘m not sure.However,many people belive there are lots of tr I'm not sure yet.Are there any vegetables in th ---What are you going to do tomorrow?---I’m not sure.I____ m Are you going to her party?I’m not sure,I ( ) stay home...ne Are you going to her party?I’m not sure,I might stay home.问： 1、— Are you free on Saturday night?— I’m not sure yet.I_____ I'm not sure.Are you a new student?合并成一句 are you sure __ simon will come tomorrow?yes,but i'm not sur i'm not sure whether worth to cherish you are 有语病吗错在哪里