2. 外语
  3. Only recently ______ possible to separate the components of fragrant substances and to determine their chemical composition.

Only recently ______ possible to separate the components of fragrant substances and to determine their chemical composition.

admin2013-01-19  31
问题 Only recently ______ possible to separate the components of fragrant substances and to determine their chemical composition.
选项 A、it becomes
B、having become
C、has it become
D、which becomes
答案A
解析
转载请注明原文地址:https://kaotiyun.com/show/eP2O777K
0

考博英语

相关试题推荐
随机试题
最新回复(0)