【题目】I ________ put the phone back into my pocket ________ you reminded me when the teacher approached.
A.should; if
B.would have; had
C.hadn't; would
D.could have; if

【答案】B
【解析】句意：当老师靠近时，如果你能提醒我，我就会把手机放进口袋。此句是省略if的非真实条件句，表示与过去的事实相反，主句用would do，从句用had done，故选B。