2. 专升本
  3. (The metal) aluminum (has been) (first) isolated (early) in the nineteenth century.

(The metal) aluminum (has been) (first) isolated (early) in the nineteenth century.

admin2021-08-11  5
问题 (The metal) aluminum (has been) (first) isolated (early) in the nineteenth century.
选项 A、The metal
B、has been
C、first
D、early
答案B
解析 应改为was。本句中有具体表示过去的时间状语，所以应该用一般过去时态。   
转载请注明原文地址:https://www.kaotiyun.com/show/QhZC777K
本试题收录于： 英语题库成考专升本分类
0

英语

成考专升本

相关试题推荐
随机试题
最新回复(0)