If we_________ sunlight_________ a dry leaf with a piece of glass, it may start

题干

If we_________ sunlight_________ a dry leaf with a piece of glass, it may start burning.

A．work; out

B．carry; out

C．focus; on

D．concentrate; on

上一题下一题 0.64难度单项选择更新时间:2012-07-20 10:52:05

小学学科试题库

初中学科试题库

高中学科试题库