问题
选择题
_____the activities might seem childish, actually they require a lot of strength and determination.
A．Since
B．Although
C．Before
D．If
答案
Ｂ
题目分析：考查状语从句。句意：尽管这些活动好像可能有点孩子气，但实际上他们需要很大的力气和决心。A. Since 由于，自从 B. Although尽管，虽然 C. Before在。。。之前 D. If如果，根据句意所以Ｂ正确。