1.Helping others is a habit,__________you can learn even at an early age.A.itB.thatC.whatD.one2.The country has already sent up three unmanned spacecraft,the most recent ______at the end of last March.A.has been launchedB.having been launchedC.bing l

1.Helping others is a habit,__________you can learn even at an early age.A.itB.thatC.whatD.one2.The country has already sent up three unmanned spacecraft,the most recent ______at the end of last March.A.has been launchedB.having been launchedC.bing l
1.Helping others is a habit,__________you can learn even at an early age.
A.it
B.that
C.what
D.one
2.The country has already sent up three unmanned spacecraft,the most recent ______at the end of last March.
A.has been launched
B.having been launched
C.bing launched
D.to be launched
3.--I'm sorry I broke the vase
--Oh,_______.It wasn't very expensive.
A.you'd better not
B.I'm afraid not
C.as you wish
D.that's all right
4.Knowing office rules--whether _______or not--is critical,especially for young job seekers.
A.written
B.writing
C.being written
D.having been writte,
5.______to too much sunlight,as is generally considered,will add to the potential of catching skin cancer.
A.Being exposed
B.Exposed
C.Exposing
D.To expose

1.Helping others is a habit,__________you can learn even at an early age.A.itB.thatC.whatD.one2.The country has already sent up three unmanned spacecraft,the most recent ______at the end of last March.A.has been launchedB.having been launchedC.bing l
都是瞎推荐,哎.
更正被推荐答案第一题!
1.D
one是a habit的同位语,而后面的you can learn even at an early age为省略关系代词that的定语从句.
其中关系代词that代替先行词one,在定语从句中充当learn的宾语,所以可以省略.
2.B
逗号前后部分主语不同,但是之间又没有连词and等引导,说明后面部分是独立主格结构.
考查独立主语the most recent (unmanned spacecraft)和非谓语动词launch之间为被动关系,且launch该动作已经发生,所以用having been done结构.
3.D
前面有I'm sorry,所以用That's all right回答,其意思是“没关系”.
4.A
此题考查状语从句的省略,即：
whether written or not = whether (office rules are) written or not
很明显被省略的主语office rules和write之间为被动关系,所以用其过去分词.
5.A
选项做句子主语,所以用动名词或不定式结构,排除B；
句意明显为被动,排除主动结构的CD.
A为动名词的被动结构,做该句的主语.

1.D 引导同位语从句
2.A
3.D
4.C
5.A

1、C 这是一句话若选AD则一句话有两个谓语，that从句前一般不加逗号
2、B 由于前面已有谓语，所以此处考察非谓语，AC错误；由于事情已经发生，所以用B；不定式表示将要发生
3、D 对话中常用语
4、A
5、B 被暴露在阳光下