4. 连词成句。
① basketball, fifty, The, is, yuan(.)

② forty, The, are, shoes, yuan(.)

③ much, the, robot, How, is, toy(?)

4. ① The basketball is fifty yuan.
② The shoes are forty yuan.
③ How much is the toy robot?

5. 读短文，判断句子正(T)误(F)。
Hello, friends! Do you like animals? Some tigers and pandas are in danger. Can we help them? Yes, we can! Let's have a charity sale(义卖) to make money for them!
We have many nice things here. We have cute toys, beautiful cards, colourful clothes, great school things and wonderful sports things. The toy bear is five yuan. The cards are three yuan. Oh, the skirt is only fifteen yuan. And the volleyball is just twelve yuan.
How nice our big sale is! Come and buy! We can help the animals together. Let's make our animal friends happy and safe!
() ① Some tigers and pandas are in danger.
() ② We have toy bears, cards and coins for the sale.
() ③ The toy bear is five yuan.
() ④ We have a small sale to help animals.
() ⑤ Our goal(目标) is to make animal friends happy and safe.

5. ①T②F③T④F⑤T