2. 外语
  3. After they _____ the first super computers in the 1940s, scientists and engineers began to develop ways to create networks.

After they _____ the first super computers in the 1940s, scientists and engineers began to develop ways to create networks.

admin2016-09-02  45
问题 After they _____ the first super computers in the 1940s, scientists and engineers began to develop ways to create networks.
选项 A、create
B、created
C、have created
D、has created
答案B
解析 考查动词时态。本句是主从复合句，主句使用了一般过去时(began)，其动作“开始开发”在after引导的时间状语从句的动作“创造第一台超级计算机”之后发生，且从句中有表示过去时间的状语in the1940s，因此需用一般过去时。B项created正确。
转载请注明原文地址:https://kaotiyun.com/show/ndiK777K
本试题收录于： 大学英语三级A级题库大学英语三级分类
0

大学英语三级A级

大学英语三级

相关试题推荐
随机试题
最新回复(0)