Betty is my good f_____.she is t______years old. she is a s_______ of zhong shan primary school(小学)。we are in the same s __________.we go to school from M _____ to F_______.We don'thave classes on s_______and Sundays.we have four l____in the morning every day. ln the a______,we have two lessons.We have thirteen subjects this t______ . Bilingual Science is a n____. subject.Betty says it's very i___