下列关于显性性状和隐形性状的描述，正确的是（　　）

写出反义词。

努力—____           精神—____       牢记—____       继续—____

阅读下面文段回答问题

    There is a tiger and a monkey. They are friends. But one day they want to know who is stronger. One of them says, “The one who can get apples over there is stronger. ”There is a river over there. The monkey says, “I can't swim. ”The tiger says, “I can swim. Please sit on my back. ”They go across(穿过) the river. The apple trees are very tall. The tiger can't reach(够着)the apples. The monkey climbs up the tree and gets many apples. Now they know they should help each other.