1.It sounds( )a plane is flying overhead A.like B.as if

1.It sounds( )a plane is flying overhead A.like B.as if
1.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.to be B.is C.what is
3.---You must go to bed now.
---So( ),and( )
A.I must...you must B.I must...must you C.must I...you must
B B

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,