2. 外语
  3. Despite much research, there are still certain elements in the life circle of the insect that ______ not fully understood.

Despite much research, there are still certain elements in the life circle of the insect that ______ not fully understood.

admin2013-12-13  57
问题 Despite much research, there are still certain elements in the life circle of the insect that ______ not fully understood.
选项 A、is
B、are
C、being
D、to be
答案B
解析 主谓一致题。此空所在的部分为that引导的定语从句，先行词为elements，根据主谓一致的原则，定语从句中的谓语动词应和先行词保持一致，故B项are正确。
转载请注明原文地址:https://kaotiyun.com/show/mXFK777K
0

专业英语四级

相关试题推荐
随机试题
最新回复(0)