2．閱讀短文，按要求回答問題。
Smart Spending It's important to be smart about money when you shop.Sometimes，people pick out too many items.They don't have enough money to pay for everything.One way to make sure you have enough money is to estimate cost.Make a thoughtful guess about how much you will spend.
Try estimating while you shop.Bring paper and a pencil.Choose one item.Think about the price.You don't need to write down the exact price.You can round up or round down.Round up or round down the prices to find the total cost.Let's say you are going to the corner store with your father.You have ＄5.00.You want to buy a bottle of orange juice，you have bought orange juice before.You know it costs＄1.67.Sixty-seven cents is more than 50 cents.Round up the cost to the nearest dollar.Your orange juice will cost about ＄2.00.Because you have＄5.00，you can buy the orange juice.Let's pretend you see a yard sale on the way to the store.There is a jump rope that you want to buy for 75 cents.Will you have enough money for the jump rope and the orange juice，too？Estimate the total cost.Seventy-five cents is more than 50 cents.Round up to ＄1.00.You can buy the jump rope for about＄1.00.The orange juice costs about ＄2.00.The total cost for both will be about＄3.00.You can buy both items，and you will have money left over!
Rules：?Round down if a price ends with less than 50 cents.
?Round up if a price ends with 50 cents or more.
（1）You can guess how much money you will spend by
.
A．shopping
B．paying
C．estimating
D．saving
（2）To estimate how much you are spending，
of your items.
A．a(chǎn)dd together the exact prices
B．round up or round down the prices
C．don't worry about the prices
D．a(chǎn)sk the shop assistant
（3）According to the passage，when you round up or round down the cost of ＄3.50 lemon juice，it costs
.
A．＄3.00
B．＄3.50
C．＄4.00
D．＄4.50
