While swimming, penguins use their feet ____ rudders to help them turn. 正解: as (1) 沒錯, 這題如果不知道rudders...
...the small stone to lay down becomes, the door has the ship's rudder decoration. 3.In the room studies the quoin, to green, the field of vision...
... a person has no firm wishes,being like a ship that without rudder,trending blindly,is the object that can hardly reach oneself's ideal...