One day Mrs. Green took her child Tom to go shopping. They (go) to the supermarket in the shopping mall.

    "do you buy things here, Mom?" Tom asked. "Because the things here are  (cheap) than those in other stores," Mrs. Green said, "Help me check the prices."

    The Greens  (be) not rich, so Mrs. Green was always careful to spend the money. She looked (careful) at the prices of the things. She bought many (kind) of things there.

    When they got home, Tom said, "I don't think you saved money by (go) to the supermarket there." "Of course I did," said Mrs. Green. "Everything was cheaper there."

    "Yes," said the child, "we must take the taxi home because we had too many things (carry). The cost of the taxi was more  the money you saved!"

    Then Mrs. Green added everything up and found her child was right.

"Well done," she said. "Next time we will do shopping near our home.