怎么做，答对重赏！(六年级英语阅读题)

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1.It's useful for us to know how much money we usually spend on different things.
2.Because different people need different things.
3.No, he doesn't.
4.He can save money on CDs by borrowing them from his friends.
5.Because we have to pay for some things only once a month or once a year.
46. It's useful for us to know how much money we usually spend on different things.
47. Because different people need different things.
48. No, he doesn't.
49. He can save money on CDs by borrowing them from his friends.
50. Because we have to pay for somethings only once a month or once a year.
1：how much mony we will have