题目

The reason why I gave in is ____ if I didn’t.           A. because she would be disappointed            B. that she would be disappointed           C. because she would have a disappointment           D. for she would be disappointed 答案：B                        解析: 主语是reason时,表语从句用that 引导。    动物摄取食物养料必须经过消化的主要原因是                                （    ）   A.食物充分发生化学反应           B.食物被消化后变成溶液才便于充分吸收 C.食物分解后，便于吸收           D.食物搅拌均匀后，便于吸收