问题
选择题
When we sleep is cultural as biological-and practices differ greatly round the globe.
A．that much
B．so much
C．too much
D．as much
答案
答案：D
考查同级比较：as +adj+as结构，as much as和…一样多，句意：我们什么时候睡觉在文化上和生理上一样多，做法全世界都不同。选D。