The   Grade 3 students at the Clean City School collect empty bottles .In June ,they are going to take them to a recycling ()   center .They are going to sell the bottles and buy some books for  the school library.
Kate has started a graph (图表) to show the number of the bottles they have collected . This is the graph .
Student Bottle Collection

The months of the School Year
小题1:In October the students collected ______ empty bottles.

A．80

B．60

C．40

D．20

小题2:The students collected  _____ more bottles in December than in January .

A．10

B．20

C．30

D．40

小题3:Form  the graph above ,we know that the students picked up the same number of bottles in  ______ and  ______ .

A． October ;February	B．September ;April
C．January ;May	D．November ; March

小题4:Why do the students collect empty bottles ? Because they ______ .

A．want to do something for their school	B．like empty bottles very much
C．want to play with the bottles	D．want to sell them to buy balls

小题5:How many bottles have they collected in November?

A． 20

B．40

C．60

D．80