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 (
)upanddown.
A.to laugh B.laughC.laughing
D.laughed
3.People use robots for (
)
A.do boring work B.doboring works C.doing boring work D.to do boring jobs
4.My parents will go to Beijing (
)
A.three days agoB 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
思路要说清楚，拜托了！！
1.--Are you sure there are UFOS? --- Sorry.I'm not sure( of
)thatA.to
B.at
C.of
D.inbe sure of something.确信某事, 固定搭配2.His joke made us (
laugh
)upanddown.A.to laugh B.laughC.laughing
D.laughedmake somebody do (something).使某人做某事, 固定搭配3.People use robots for (doing boring work
1 B be sure of ，固定搭配，意思是确定，肯定2B make 是使役动词，后面动词用原形3 C for此处是介词，后面跟动词的话应是动名词形式，即-ing形式4 C 此选项意思是三天以后，其它选项都没有将来的意思5 A be sure that···live后应加地点，此处对地点提问，所以是where6 A on···si
