1. What kinds of things were used as money before coins or paper money?

-All kinds of things were used as money such as shells, almonds and tea.

2. What kinds of things were used as money before the appearance of coins or paper money?
-Shells, almonds and tea were used as money.

3. Who used shells as money?
- Chinese used shells as money.

4. What were coins made from?
-They were made from gold and silver.

5. What are the two good things of coins?
- First, they could be carried easily. Second, they made exact exchanges possible.

6. Because coins were heavy, what did people start to do?
- People started to keep coins at banks.

7. What did people begin to use as money?
-They began to use the slips of paper as money.
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Would you check the questions and answers? Are they all correct?

All are fine except for a word in #5. I'd use "about" instead of "of" toward the end of that question -- "about money?"

" ... about coins?"

The questions and answers provided are mostly correct. However, there are a few inaccuracies:

1. What kinds of things were used as money before coins or paper money?
- The answer is correct. Shells, almonds, and tea are examples of items that were used as money before the introduction of coins or paper money.

3. Who used shells as money?
- Shells were indeed used as money in various parts of the world, including China, but they were not exclusively used by the Chinese. Many different cultures and societies throughout history have used shells as a form of currency.

4. What were coins made from?
- While coins were primarily made from metals such as gold and silver, it is important to note that coins can be made from other materials as well, including copper, bronze, and nickel.

6. Because coins were heavy, what did people start to do?
- The statement that people started keeping coins at banks because they were heavy is not entirely accurate. Banks have been historically involved in storing valuables, including coins, but the reasons for depositing coins at banks were more related to security and convenience rather than solely the weight of the coins.

Other than these minor points, the questions and answers are generally correct.