We can visit you on Saturday or Sunday. Our plans are fairly _____.
A. flexible
B. possible
C. impossible
D. personal
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Modern music may have a _____ influence, as well as a positive (积极的) one on teenagers.
A. good
B. poor
C. nice
D. negative
His white hair was in sharp _____ to his dark skin.
A. difference
B. contrast
C. opposite
D. background
丝绸之路上聚落的大小取决于(),而后者的规模取决于可以使用的河流或湖泊的水流量。
A. 驿站
B. 绿洲
C. 军屯
D. 粮仓
()在阿拉尔汇聚成塔里木河。
A. 叶儿羌河
B. 和田河
C. 阿克苏河
D. 渭河