语法综合练习7Sales of CD's have greatly increased since the early
语法综合练习7
Sales of CD's have greatly increased since the early 1990s, when
people ______ to enjoy the advantage of this new technology.
A. begin B. began C. have begun D.had begun
请详细写出解题的过程和思路.
Sales of CD's have greatly increased since the early 1990s, when
people ______ to enjoy the advantage of this new technology.
A. begin B. began C. have begun D.had begun
请详细写出解题的过程和思路.
可能相似的问题
-
1年前4个回答
-
语法综合练习题写出下列单词的复数形式city. 2.key.
1年前1个回答
你能帮帮他们吗