【单选题】Food, water, shelter: the three essentials for survival on Earth. But there's a fourth we don't think about much, because it's freely available: _______.
【简答题】U3_Show Time.mp4 Mrs. Sanchez: You should have real food for breakfast: (1) ______, milk, fruit. Please, let me make something for you. Hector: How about some cake? Cake has eggs and (2) ______ and fr...