became 是什么意思

	become 的过去式。

	1.	Bank communications become more effective . 银行的宣传变得效果更强。
	2.	Home has become much less of a workshop . 家庭已远远不象一个作坊了。
	3.	The weather became finer and more settled . 天气逐渐转晴并稳定下来。
	4.	The fibers lose strength and become brittle . 纤维强度下降，且易断。
	5.	Presumably reactive surfaces became blocked . 反应表面可能被堵塞了。
	6.	The quiet village suddenly became astir . 寂静的山村，顿时沸腾起来。
	7.	His agegroup became eligible for the army . 他的同龄人应当应征入伍。
	8.	He changed his manner; became very cold . 他态度大变，变得异常冷淡。
	9.	Buying tires has become confusing . 购买轮胎却变成了使人困惑的问题。
	10.	Large tracts of wasteland have become a granary ... 荒滩变成米粮川。

became是什么意思