题目

阅读下面短文，从短文后各题所给的A、B、C和D四个选项中，选出可以填入空白处的最佳选项。Sitting in the classroom, I felt confused.Our teacher pointed at the blackboard and gave us instructions. Looking around, I watched as my classmates 1 their heads and started writing. A wave of 2 washed over me-I couldn't read the board, for I couldn't see clearly. It didn't 3 at primary school because my teachers always read aloud what they were writing. But now, I was expected to read by myself.Mum took me to a(n)4. I was diagnosed with a terrible sight problem. I was 5刚刚做好的馒头或面包通常是比较松软的，这和下列哪种微生物有关A.乳酸菌 B.酵母菌 C.霉菌 D.病毒