短文改错The fly can walk up a wall.It can walk upside down 1.___
5个回答

1 They fly can walk up on（在墙上爬） a wall.It can walk upside down,too.

2 But how dose a （不是特指）fly do?A fly has six legs.

3 It walks（第三人称单数） with three legs up and three legs down.

4 Each leg has a little sticky pad on it,almost like(原型,almost like固定使用) a shoe.

5 The pads stick to the wall.So a fly can walk up on a wall and (and 并列可以省掉相同的主语)doesn't fall

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