课文原文填空（每空1分，共5分）

The train was wonderful and the food was great. We ate great meals cooked by 小题1: ! For the first few hundred kilometres of the journey, the   小题2: was very colourful. There were   小题3: and the soil was dark red. After that, it was desert. The sun 小题4: , there was no wind and there were no clouds in the sky. Suddenly, it looked like a place from another time. We saw 小题5:  farms which were built more than a hundred years ago. 

单胃成年动物需（）种必需氨基酸，生长期还需（）和（）。