题目

When I left for the United States to study. I had butterflies in my stomach. I was nervous because I was going to__61__new place with new people and new customs. I couldn’t even understand__62__(they)language. Everything was different__  63_  my own country. There was nobody that I could talk to. I just had my husband,__64__was a new person for me, too. It was a sad moment when I had to say goodbye to my family and friends. I didn’t want__65__(leave)my hometown because I __66__(grow) up there and had wonderful__67__(memory) of the place. So,__68__ (think)about all these changes已知-2，a1，a2，-8四个实数成等差数列，-2，b1，b2，b3，-8五个实数成等比数列，则b2（a2-a1）=（　　）A．±8B．-8C．8D．±4