I kept looking at the man wearing a pair of glasses, wondering .
A. whether did I borrow his book
B. where I had seen him before
C. what I knew his wife
D. when had I helped him
网友回答
A. whether did I borrow his book
(答案→)B. where I had seen him before
C. what I knew his wife
D. when had I helped him
解析：考察宾语从句：宾语从句的语序是陈述句语序，AD选项都不符合，C项意思不对，句意是：我一直看着带一副眼镜的男子，想知道我在哪儿见过他的。选B。