是becomes：

　　He quickly becomes the centre of gravity .

　　他很快就会成为众人关注的焦点。

　　Erectile dysfunction also becomes more common .

　　勃起功能障碍也变得更加普遍。

　　Lapland &39;s main city becomes a winter wonderland .

　　拉普兰的主要城市变成了冬季的仙境。

　　It soon becomes highly addictive .这项功能很容易令人上瘾。

　　Pleasure becomes the driving force behind their actions .

　　快乐成了他们行为背后的驱使力量。