This is ___ old watch. Could you give me ___ new one?

Green is the color of _______ nature. And you can enjoy the colorful rainbow in _______ sky after the rain.

My grandfather is a fat old man _____ a long white beard. [ ]

The number of students in Class Ten ____ sixty-six, and a large number of them ____Jay Chou.

They are going ______ a picnic next Sunday. [ ]