15．
Billy always loved blueberries．They were his favourite fruit．Today he was going to make juice with his uncle．His uncle likes to make juice out of everything．He made carrot juice，apple juice，vegetable juice，and more juices．But he had never made blueberry juice before!
First，Billy and his uncle went to a blueberry farm．They were each given a basket．They picked for an hour and got several pounds．It was hard work picking the little berries from the trees．Now Billy understood（明白）why they were expensive in the shops．
Next，they had to wash the fruit．Some of them still had leaves．Those had to be pulled off．Then the bad berries had to be thrown away．They washed the berries and made them air-dry．
After that，they pushed the blueberries through a strainer（过滤网）．The strainer caught most of the seeds and skins，and only left a small glass of dark purple juice tothem．
When they tasted the juice，it wasn't very sweet．Billy's uncle didn't want to add white sugar to the juice．It was better to use a naturally sweet juice，like apple juice，pear juice，or grape juice．They used grape juice as a sweetener（甜味剂），because grapes had a similar colour to the blueberries．
Finally，they could drink it．It was a lot of work to make juice，but it sure was refreshing!
63．Billy's uncle hadn't madeB juice before．
A．carrot
B．blueberry
C．apple
D．vegetable
64．Billy thought blueberries were expensive becauseC．
A．they were delicious
B．they had to be sent（送）to the store
C．it was hard to pick them from the trees
D．there weren't many blueberry trees on the farm
65．The underlined word"them"in Paragraph 4refers toD．
A．blueberries
B．farmers
C．seeds and skins
D．Billy and his uncle
66．The correct order of making blueberry juice isA．
①wash blueberries．②pick blueberries from trees．
③add grape juice to the blueberry juice ④push the blueberries through a strainer．
A．②①④③
B．②①③④
C．②④③①
D．④①②③
67．The passage is mainly aboutC．
A．why Billy liked blueberry juice
B．where Billy got the best blueberries
C．how Billy made blueberry juice with his uncle
D．what Billy did on the blueberry farm with his uncle．
