问题补充：
If not tired from work, I will spend some time in my study every evening.
A. locking
B. locked
C. having locked
D. being locked
答案：
A. locking
(答案→)B. locked
C. having locked
D. being locked
解析：考查分词做状语。本题的lock与句子主语I构成被动的关系，使用过去分词的形式。句意：如果不是因为上班太累，每天晚上我会把自己锁在书房里度过一段时间。故B正确。本题容易错选A项，但是与句意不符。
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