问题补充：
—The battery in my cell phone is running low.
—I that last night before we went to bed.
A. was noticing
B. have noticed
C. would notice
D. had noticed
答案：
A. was noticing
B. have noticed
C. would notice
(答案→)D. had noticed
解析：本题考查时态。根据“我昨晚注意到”是在“我们上床睡觉”之前，故用过去的完成时had noticed，选D .
