问题
选择题
During the seven-day May Day holiday, _____ families went sightseeing. [ ]
A. thousand
B. thousands
C. thousands and thousands
D. thousands of
答案
答案：D
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During the seven-day May Day holiday, _____ families went sightseeing. [ ]
A. thousand
B. thousands
C. thousands and thousands
D. thousands of
答案：D