1.Some holidays are so much fun that they ______outside of their culture.A.catch atB.catch upC.catch onD.go on2.It was April 29,2011___________Prince William and Kate Middleton walked into the palace hall of the wedding ceremony.A.thatB.whenC.sinceD.before3.They think the room is ________,but as a matter of fact it is already occupied.A.vacantB.bareC.blankD.hollow4.She has a gift for creating an atmosphere for her students ________allows them to commu

证明，twist 作为及物动词，后跟 one's ankle是很地道的英语，并不汉语思维即使这样，her ankle twisting, 作状语表示一个与主句动词同时或几乎同时发生

一题chtch on意为变得流行 二题that，是it is ……that ……强调句式；三题vacant，意为空的，空闲的 下文occupied是occupy的被动形式：被占据，被使用；四题which定语从句，从句缺主语而主句结构完整，应该用which或that；五题possessions，possession 意为财产，所有物，可数，故加s；六题句子主干为satellite was called EB.缺定语satellite 是人造卫星，显然send这个动作是主动的，D。

1.Some holidays are so much fun that they __________outside of their culture.
catch on 表示 “流行起来，受欢迎”之意。
意思：有些节假日很有意思，即使在该国家以外也流行起来。
2.It was April 29,2011___________Prince William and Kate Middleton walked into the palace hall of the wedding ceremony.
本句是对时间的强调句型，所以用 that. （即使被强调部分是时间和地点也用 that）
意思：正是2011年4月29日，威廉王子
和凯特 米德尔顿步入了婚礼的殿堂。

3.They think the room is ________,but as a matter of fact it is already occupied.
vacant 没有人入住的，空闲着的
意思：他们以为那个房间是空着的，但实际上已经有人订了。
4.She has a gift for creating an atmosphere for her students ________allows them to communicate freely with each other.
which ， 引导 gift 的定语从句，在从句中作主语。
意思：她有一种为学生创建气氛的能力，使得学生能够相互无拘无束地交流。
5.He came here without friends or ________and made his fortune.
possessions 表示个人财产，多用复数。
意思：他刚来的时候没有朋友和财产，后来发了家。
6.The first satellite ___________telephone signals was called Early Bird.
used to send 表示被动，后置定语，本句的谓语动词是 was called
意思：第一颗用来发送电话信号的卫星叫晨鸟。

不知道答案是什么，我看了一下，第一题几个词组没见过，就不误导了。
第二题选A，构成“it is……that”强调句。
第三题选C，A意为真空；B强调秃的，什么都没有的；C表示空的；D意为中空的，空虚的。
第四题选A，宾语从句，宾语从句中不能用“what”，这里A代替“gift”，在从句中做主语。
第五题选B，possession意为财富，是不可数名词。
第六题选D，意为过去用来发射电话信号的首个卫星……

不知道对不对，个人拙见，如果有误，希望不要误导了你。

C1.Some holidays are so much fun that they ______outside of their culture.
A.catch at
B.catch up
C.catch on
D.go on
B2.It was April 29,2011___________Prince William and Kate Middleton walked into the palace hall of the wedding ceremony.
A.that
B.when
C.since
D.before
A3.They think the room is ________,but as a matter of fact it is already occupied.
A.vacant
B.bare
C.blank
D.hollow
A4.She has a gift for creating an atmosphere for her students ________allows them to communicate freely with each other.
A.which
B.where
C.what
D.who
A5.He came here without friends or ________and made his fortune.
A.possessions
B.possession
C.wealths
D.good
D6.The first satellite ___________telephone signals was called Early Bird.
A.was used to send
B.used to be sent
C.was used to sending
D.used to send