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In order not to be disturbed, I spent three days in my study. [ ]A. lockingB. lo

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In order not to be disturbed, I spent three days in my study. [ ]A. lockingB. lo

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

试题答案

B