问题
选择题
In order not to be disturbed, I spent three days _____ in my study. [ ]
A. locking
B. locked
C. to lock
D. lock
答案
答案：B
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In order not to be disturbed, I spent three days _____ in my study. [ ]
A. locking
B. locked
C. to lock
D. lock
答案：B