Where is Tom We can’t find him anywhere.——Perhaps he_____home.

Why not ____ help when you were in trouble

________you interrupt now? Can’t you see I’m on the phone? — SorrySir, but it’s urgent.[ ]

ear-old teenager from Guangdong nicknamed Niko demanded an apology from Youku, which he believed violated their copyrights as it used his team’s photos without ______.

Why does the lake smell terrible? — Because a large amount of water_______