SAT语法题(11年sunday)IE题 Those who have already attended a performance of the play have said that it is at once exhausting because of its length and complexity but its clever plot is still intriging. (划线部分为but及以后) 不选:however it is intrguing in its clever plot 正确项:and intriguing because of its clever plot. 顺便求however的用法 还有这句中 at once放这是干什么用的 总觉得and intriguing 很奇怪,因为觉得应该是转折的语气