综合评估检测（一）
必修1～3
(120分钟 150分)
第二部分 英语知识运用（共两节，满分45分）
第一节 单项填空（共15小题；每小题1分，满分15分）
21. Although everything seems to have been taken into consideration，_______ accident can happen when the astronauts walk in ________ space.
A. /; the B. an; the C. the; the D. an; /
22. ［2012安徽皖南八校］Shenzhou Ⅷ has docked with Tiangong-1 successfully, _______ the start of the establishment of China’s own space station.
A. marked B. to mark
C. marking D. having marked
23. Five of the twelve bronze animal heads _______ to China, with seven other ones still missing.
A. returned B. had returned
