1.(2020﹒全国卷I﹒语法填空) Data about the moon’s composition, such as how much ice and other treasures it contains, could help China decide whether 70 (it) plans for a future lunar (月球的) base are practical.
【答案】its
【解析】考查代词。句意同上。根据空后的名词plans可知，此处应使用形容词性物主代词its，故填its。
2.(2019﹒天津)A study shows the students who are engaged in after-school activities are happier than _________who are not.
A. ones B. those
C. these D. them
【答案】B
【解析】考查代词。句意：一项研究表明，参加课外活动的学生比不参加课外活动的学生更开心。空格处代词与the students是对应关系，可以用the ones或者those替代。“them”指代的是前边提到的复数名词，不能与the students形成对应关系。“these”一般不用定语从句修饰。故选B。
