这两道英语题，希望能很快有答案和解释

1,( )says so, it is wrong.

A no matter who

B no matter what

C whatever

D what as he

2,i cannot ( )puzzled, for i simply cannot understand how i could have made such a stupid mistake.

A help feel

B help but to feel

C but to feel

D but feel

顺便希望得到这几个词语的解释

1 look down on

2 get down to

3 cast down on

4 get away with

5 relative

6 rush

1A(BCD的意思是相同的，所以只能是A)

2B（cannot help but to 是句型爱莫能助的意思）

1瞧不起2着手进行3垂下的4逃脱5相对6繁忙、冲击、匆促