The boy is so fat too much food and little exercise.A. as B. thatC. because D. because of

The boy is so fat too much food and little exercise.
A. as
B. that
C. because
D. because of

A. as B. thatC. because (答案→)D. because of解析：as 由于，随着；that以至于；because因为，接从句；because of因为，接名词性短语。由于吃太多食物而少锻炼，这个男孩是这么胖。故选D。

这个答案应该是对的