A:为省力,可将用力划桨的手靠近支点
B:为省力,可将用力划桨的手远离支点
C:为省距离,可将用力划桨的手远离支点
D:将用力划桨的手靠近支点,既能省力又能省距离
You ______a teacher. I ______ a student. My sister ______a student, too.