The lighting struk the tree during the storm.(改为被动语态) He lives alone,but he is happy.改同义句
问题描述：
The lighting struk the tree during the storm.(改为被动语态) He lives alone,but he is happy.改同义句
The two tunnels were joined up.(改主动语态)
答
1 The tree was struck by the lighting during the strom.
2 Though he lives alone , he is happy.
3 We / They joined up the two tunnels.