第12题: [单项选择](Having isolated) on a remote island, (with) little work (to occupy) them, the soldiers suffered from boredom and low (spirits.) A. Having isolated B. with C. to occupy D. spirits 参考答案:A 答案解析:Having isolated是分词完成式的主动式,应该用被动式Having been isolated。
第13题: [单项选择]消化性溃疡的直接征象是() A. 痉挛性切迹 B. 上腹疼痛 C. 龛影 D. 胃黏膜僵直 E. 钡剂潴留 参考答案:C