问题
选择题
By the time these books were published, he _____ addicted to them.
A．had become
B．becomes
C．has become
D．became
答案
答案：A
考察时态.根据时间状语,到这些书出版时,可知主句动作在过去已经完成,故用过去完成时态,选A.
搜题请搜索小程序“爱下问搜题”
By the time these books were published, he _____ addicted to them.
A．had become
B．becomes
C．has become
D．became
答案：A
考察时态.根据时间状语,到这些书出版时,可知主句动作在过去已经完成,故用过去完成时态,选A.