李老师在有关“声音”的教学设计写：“他们对声音有丰富感受，但尚未建立物体的振动产生声音这一科学概念”，该教师行为是（ ）。

(单选题)The quality of education in this small school is better than (单选题)Frank went back home, ______ to study much harder than befor (单选题)Unless ______ to speak, you should remain silent at the conf (单选题)It was in the cafe ______ she met John yesterday ______ she (单选题)The factory was built in a secret place, around ______ high (单选题)______ that she was going off to sleep, I asked if she’d lik (单选题)One of the important questions they had to consider was ____ (单选题)She is very important to us. We have been prepared to do ___ (单选题)She was a friendly teacher. She spoke to the students ______ (单选题)As a grassroots singer, she reads everything she can ______