问题
选择题
—Is it interesting to play computer games?
—Yes, _____ you are interested in playing computer games, you’ll have trouble giving it up.
A．once
B．twice
C．as
D．as soon as
答案
答案：A
此题考查连词once的用法，表示“一旦…”句意：玩电脑游戏有趣吗？--是，一旦你对电脑游戏感兴趣了，你就很难戒掉。As做连词，表示：因为，随着，按照，as soon as表示：一…就，twice是两次。选A。