The boy claimed ______ the man outside the school.
A) to see
B) that he saw
C) to have seen
D) that he has seen
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患者男性，50岁，间歇性上腹隐痛10年，近半年来上腹痛加重，无规律。为了发现或排除胃癌，应首先采取的措施是
A. 上腹部CT检查
B. X线消化道造影
C. 纤维内窥镜取活组织检查
D. 胃液分析和大便隐血试验
E. 在积极治疗的同时定期门诊复查
The fishing boat ______ on the beach.
A) hang about
B) hang on
C) hang up
D) hang back
房地产估价是一种关乎（ ）的切身利益乃至社会公共利益，较为复杂的专业服务活动。
A. 相关单位
B. 个人
C. 集体
D. 相关单位和个人
The headmaster ______ us that the school would be closed for one day next week.
A) informed
B) instructed
C) told
D) noticed
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