A-A+
What does it refer to in the last sentence o
问题详情
What does "it" refer to in the last sentence of the fourth paragraph？
A．The waiting list to participate in the study.
B．The pilot study.
C．The desperate people.
D．The anti-smoking rinse.
参考答案
正确答案：A
解析：整段来考虑。第四段谈的都是志愿者的事，如果先行研究成功，那么应该是志愿者更加纷涌而至。选A。
