阅读下面材料，在空白处填入适当的内容（1个单词）或用括号内单词的正确形式（不超过3个单词）或根据首字母和中文提示填写单词的正确形式。

I know my students by looking at their body language. I know when students are really interested, because they lean forward and look at me. Most tend 【小题1】 (look) up and make eye contact. People have a 【小题2】 (tend) to lean towards whatever they are interested in. So if the student has his head【小题3】 (lower) to look at his watch, it 【小题4】 (imply) he is bored and just counting the minutes for the class to end. When they spent all their time 【小题5】 (look) anywhere but me, I know they are amused by something else. Their favorite activity is daydreaming. 【小题6】 their chins on their hands, they occupy 【小题7】 (them) by staring out of the window or up at the ceiling. Students who are angry, afraid, or experiencing 【小题8】 (anxious) may have their arms crossed in front of their chests and their legs closed or crossed, they may also hide their faces in their hands like they are 【小题9】 (embarrass) or ashamed. They act this way merely because they are afraid of being called on by the teacher. So 【小题10】 (react) to body language is an important component of being a teacher.