问题
选择题
In the US they focus on creative thinking skills, _____ in China they only focus on theory．
A．since
B．when
C．while
D．now that
答案
答案：C
考查连词。since 自从，因为；when 当……时候；while 然而，表前后对比；now that由于，既然。句子前后表对比，所以选C。