_________ English can be difficult to learn, it is a very useful tool for commun

题干

_________ English can be difficult to learn, it is a very useful tool for communication.

A．As	B．When
C．While	D．Because

上一题下一题 0.64难度单项选择更新时间:2014-12-26 08:32:42

小学学科试题库

初中学科试题库

高中学科试题库