问题补充：
Because of the bad management, this restaurant was not it was 10 years ago.
A. half as good as what
B. as half good as that
C. as good as half what
D. half as good as that
答案：
(答案→)A. half as good as what
B. as half good as that
C. as good as half what
D. half as good as that
解析：
倍数的表达，有以下几种情况：
倍数+as+adj/adv+as+n
倍数+adj/adv的比较级++than+n
倍数+the(size,height,length名词+...+of+n
倍数+what从句
本题中根据句意：由于糟糕的管理，这个餐馆的经营状况只相当于十年前的一半。用what作后面表语从句的连词并充当was后的表语成分。故选A.
