---John came to school as early as usual.
---So he did.He es so early to make the best of time to study.
A. So
Band
C. but
D. as
网友回答
A. So
B. and
C. but
(答案→)D. as
解析：考查固定搭配：句意：--约翰象平常一样早早到了学校。--是的，他来的这么早为了能充分利用时间学习。So+adj/adv.+as to do“如此…以至于….”，选D。