A：by a bus
B：takes the bus
C：by bus
D：take a bus
______ can make my mother change her mind. She is such a person who never gives up easily.
认为“以古为镜，可以知兴替；以人为镜，可以明得失”“水能载舟，亦能覆舟”的封建帝王是（ ）
