A:How's business?
生意如何?
B:Couldn't be better.
好得不得了。
注释:
(It) Couldn't be better.
(好得不得了/好得不能再好了。)
*此处couldn't 不可用can't代替。
例:A: How're you doing?
(A:近来如何?)
B: Couldn't be better.
(B:好得不得了。)