题目

如图，直解三角板的直角顶点落在直尺边上，若∠1=56°，则∠2的度数为（ ）A．56° B．44° C． 34° D．28° 答案：【答案】C【解析】试题如图，∵AB//CD，∴∠3=∠1=56°．∵∠2+∠3+90°=180°∴∠2=34°，故选C． —Hi, Johnson, any idea where Susan is? —It’s class time, so she ______ in the classroom now.A．can beB．must have beenC．might have been D．should be