This child is a born mathematician.He loves mathematics
he will spend a whole day solving mathematical problems without remembering to have meals.
A and so
B to the extent that
C so much so that
D so much that
诶~我觉得我会选B或D，但我不知道B和D在这道题里有什么区别咧。此题来自于大学英语（综合教程）二 test yourself（Units 1—4）。谢谢~~我没分给啦。sorry。穷死了
后来我在课本上找到答案，答案是选C。我奔泪............................请问为什么呢？
