our French teacher is used to ( )in his own car in such heavy traffic. (drive)

标准答案来了
driving
这里的结构是be used to doing sth，这里的to是介词，表示习惯于做某事
翻译，我们的法语老师已经习惯了在如此繁忙的交通里开车

our French teacher is used to (drive )in his own car in such heavy traffic.
是be used to do的句型.