If not ___from work,i will spend some time____in my study.(后面一空是关键)

If not ___from work,i will spend some time____in my study.(后面一空是关键)

题目
If not ___from work,i will spend some time____in my study.(后面一空是关键)
A.being tired ;locking
B.tiring;locked
C.tired ;locked
D.to be tired;being locked
答案
A
spend sometime (in) doing something
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