问题
选择题
I had just locked my door ________ I realized I ________ my key on the kitchen table. [ ]
A. as; left
B. when; had left
C. after; left
D. while; had left
答案
答案：B
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I had just locked my door ________ I realized I ________ my key on the kitchen table. [ ]
A. as; left
B. when; had left
C. after; left
D. while; had left
答案：B