【简答题】根据短文判断正(T)误(F) Good evening! I'm Dale. I'm fine. I have a map. It's a map of the world (世界). I have a black key, a yellow key and a white key. I have a pen and a ruler. What color is the pen? It's b...
【单选题】Dale is a guitar teacher and Terrence is a tile layer. If Dale teaches Terrence’s daughter to play the guitar in exchange for Terrence tiling Dale’s kitchen floor,
A.
only Dale is made better off by trade.
B.
only Terrence is made better off by trade.
C.
both Dale and Terrence are made better off by trade.
D.
neither Dale nor Terrence are made better off by trade.