As time went on, Lucy began to wonder if John their date.
A. has forgotten
B. had forgotten
C. would forget
D. would have forgotten
网友回答
A. has forgotten
(答案→)B. had forgotten
C. would forget
D. would have forgotten
解析：had forgotten 是began to wonder以前的动作, 是“过去的过去”,强调动作的完成.