[课 下 作 业]
Ⅰ.单项填空
1．—Have you been to the Great Wall?
—Perhaps not in my memory.________，it might have been during my early childhood.
A．If any B．If ever
C．If not D．If possible
答案 B [If ever是If I have ever been to the Great Wall的省略。]
2．An annual study found that 2% of South Koreans aged 10—19 needed treatment for excessive online gaming or were at risk of________．
