英語選擇題let's settle this matter
Let's settle this matter____
A.once and for all
B.once for all
C.once all
D.once at all
我選的是B,請說明錯誤原因和正確答案理由.
Smoking is so harmful to personal health that it kills ____ people each year than automobile accidents.
A.seven more times
B.seven times more
C.over seven times
D.seven times
我選的是A，要求同上。