问题
选择题
The mother didn't know ______ to blame for the broken glass as it happened while she was out. [ ]
A. who
B. when
C. how
D. what
答案
答案:A
The mother didn't know ______ to blame for the broken glass as it happened while she was out. [ ]
A. who
B. when
C. how
D. what
答案:A