(A)nature reserves (A)us learn more about protecting animals.
问题描述：
(A)nature reserves (A)us learn more about protecting animals.
A.studing,helps B.studies,to help C.study,helping D.studying,help
为什么选A,reserve明明加了S的.
（D)the bus drove(D)the diection of the centre of the town.
A.to B.for C.towards D.in
这题完全不懂.
答
第一题 studying 是分词做主语nature reserves 是自然保护区 了解自然保护区这件事情帮助我们. 虽然加了s但不影响后面谓语
学习这件事Helps
第二题前一个是什么- -?后一个是In the direction