2x(a﹣2)﹣y(2﹣a),其中a=0.5,x=1.5,y=﹣2.
当a=0.5,x=1.5,y=﹣2时,原式=(0.5﹣2)×(3﹣2)=﹣1.5
The woman __________ yellow is our English teacher.