．The reporter said that the UFO ________east to west when be saw it.
问题描述：
．The reporter said that the UFO ________east to west when be saw it.
The reporter said that the UFO ________east to west when be saw it.
A．was travelling B．travelled
C．had been traveling D．was to travel.
a or d
and why
a or c
答
A.
过去进行时.
当他看到的飞碟的时候,飞碟正从东向西飞行.
d 的话,语法都不对.如果改成 was going to 是说它正要从东向西飞行,也就是说它还没有开始飞.
但看上下文,一定是说飞碟正在移动,所以说.它正在从东往西飞.