问题补充:
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
答案:
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。