题目

阅读下面短文，从短文后各题所给的四个选项（A, B, C和D）中，选出可以填入空白处的最佳选项。 Cathy and I met a few days after I first arrived in China. I was walking around the English academy which had 1me, introducing myself to my new colleagues, most of whom were Chinese. I entered Cathy's2 , saw her, and immediately felt some 3 and happy emotions. She 4 so kind, yet professional. I couldn't stop smiling like a (n) 5 . After introducing ourselves and exchanging6 questions, I asked whether she knew anyone who could7 me in Chinese. She said she could, and 8 下列关于原核生物的叙述中，错误的是 [　　] A．蓝藻无叶绿体，但能光合作用释放O2 B．原核生物有生产者、消费者和分解者 C．细菌无线粒体，不能进行有氧呼吸 D．原核生物的核酸既有DNA也有RNA