3 Flash photography is (widely) used for (taking) pictures when the natural light (is insufficient), such as outdoors at night and indoors (most of time).
[此贴子已经被作者于2003-4-15 2:15:03编辑过]
作者: hxd21 时间: 2003-4-15 04:56
choose D It should be (at most of time).