— When you _____ these two things,you can know more about them.
— That's true. First,let me find their differences.
三个选项的含义分别是：include 包括；compare 比较；complete 完成。根据本题语境可知，当你“比较”这两个东西的时候，你就能更了解它们。故答案为选项B。
— The weather report says it's going to have a shower this afternoon.
— It does？We'd better _____ now,just in case.
本题考査固定搭配。
had better do sth. 表示“最好做某事”，故答案为选项C。