—Yes，____ (she) can.

已知直线l₁：ax+2y+6=0，l₂：x+（a﹣1）y+a²﹣1=0，若l₁⊥l₂，则a=____ 

    Now boys and girls, I have got something to t____ you. Tomorrow is Friday. We are going to have our O____ Day. Our parents will come to school and v____ our school. They will a____ at three t____. They will s____ in the classroom and listen to our teachers. Then they will go to the p____ to see our wonderful show.