问题补充:
under the tree was a charming girl aged about seventeen and eighteen.
A. Sat
B. Sitting
C. To sit
D. Sit
答案:
A. Sat
(答案→)B. Sitting
C. To sit
D. Sit
解析:考查倒装。句意:正坐在树下的是一位年约十七八岁的可爱女孩。表语放在句首加强语气时,其结构为:v-ing/v-ed+介词(短语)/副词+be+主语+其他成分。根据句意,选择句意及倒装结构选择答案B。