1.她笑起来借以向我们隐藏她的紧张.
问题描述：
1.她笑起来借以向我们隐藏她的紧张.
She laughed _______ _______ her nervousness ________ us.
2.Tom 在去办公室的路上意外伤了左腿.
Tom had his left leg _______ _______ _______ on the way to his office.
答
1.to hide ,from
2.hurt ,by chance/accident