1．when we talk about exercise, walking and riding your bike ________(算作，算数)．
2．the boy can ________(集中)on a book for a long time.
3．the ________(数量)of snow this year has been above average.
4．they carried their ________(设备)on their backs.
5．mary has ____________(增加)a lot of weight recently.
6．large________(大量) of money were spent on the bridge.
7．ten people were killed in the accident，________(包括) one child.
8．alan helped me a lot.obviously i can not have made such great________(成就) alone.
9．according to the survey，children use the internet________(主要地) to play games.
10．young people usually have more________(能量) than the old.
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