1.It sounds( )a plane is flying overhead A.like B.as if1.It sounds( )a plane is flying overhead A.like B.as if 2.To save money for my education,mother often takes on more work than ( )good for her.A.t
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1.sound as if 听起来好像…… 后面接从句
e.g.It sounds as if somebody has broken in.
sound like 听起来像…… 后面接名词或名词性短语
e.g.It sounds like the dog barking.
结合题中“a plane is flying overhead ”所以选B
2.than作关系代词时,一般用在形式为比较级的复合句中,其结构为形容词比较级（more）．．．than＋从句,than在从句中作主语,相当于that,代表它前面的先行词.（这时,它兼有连词和代词的性质,也有学者认为这种用法的than是连词,后面省略了主语what.）
如：①The indoor swimming pool seems to be a great deal more luxious than is necessary．室内游泳池过于豪华.
②He got more money than was wanted．他得到了更多的钱.
这道题就是than 作关系代词,先行词就是more work,所以不需要that和which
3.这个就跟So do I,和So I do的道理是一样的.So do I 是“我也一样”,So I do是“确实如此”,结合题目,意思就是说“我确实是要去睡觉了,你也一样”,所以选B
终于回答完整了,也感谢你的提问,