My name is Amy．I'm a student in junior high school．I usually get up at half past six in the morning．I have breakfast attenpast seven．I live near my school，so I always walk to school．I have 4classes in the morning and 3classed in the afternoon．The first class begins at ten past eight in the morning．The last class in the morning is over at ten to twelve．I study Chinese，math，English，history，geography，art，music，science and some other subjects．I have 2Chinese lessons，two math lessons and an English lesson every weekday．I have two history lessons and two geography lessons a week．Of all the subjects，I like geography best because I think it's very interesting．My geography teacher Mr Li often tells us some stories about different countries．They are all interesting．I think English is a little difficult，but I should learn it well because it is useful（有用的）

68．What time does Amy's last class end in the morning？___

A．At 6：30

B．At 7：10

C．At 8：10

D．At 11：50

69．How many math lessons does Amy have a week？___

A．Ten

B．Seven

C．Five

D．Two

70．Which subject does Amy like best？___

A．Chinese

B．English

C．History

D．Geography

71．What does"they"refer to （指代） here？___

A．The lessons

B．The stories

C．The games

D．The teachers．