问题补充：
He was working on a new book I went to see him.
A. first time
B. for the first time
C. by the first time
D. the first time
答案：
A. first time
B. for the first time
C. by the first time
(答案→)D. the first time
解析：本题考查时间状语从句。句意：我第一次去看他的时候，他正在写一本新书。the first time作为名词词组可引导时间状语从句。类似的还有the last time，next time，the moment等。
