单词拼写。 1. The ___________ (气氛)changed as he walked in. 2. The professor has brought in a good ____________ (系统)of teaching languages from abroad. 3. He was very ___________ (粗暴的)when he got drunk. 4. They laid eggs too and __________ (生存)on the earth for more than 140 million years. 5. A friend in need is a friend ___________(真正地). 6. He addressed the ___________ (信封)and put a letter in it. 7. His excuse for being late was totally ___________ (不可信的). 8. After three hours of waiting for the train ,our ___________( 耐心)was finally exhausted. 9. The boy shows great ____________ (好奇心)about animals. 10. The song ___________ (使想起)me of the days we spent together several years ago.