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

e came back, he found the baghe had ______________ over the seat was gone.

Many countries, American,Japan, Brazil and Spain, want to host the 2016 Olympic Games.

There is a big garden in the residential buildings，________actually has become a good place for people to meet and communicate

They are discussinghow to ____a plan to advertise their new product in the office.