It was my sister ________ first had the idea to cycle along the entire Mekong River.

Although advertisements enable _________ to make decisions quickly, they sometimes cause lots of trouble.

Joan together with her parents ____ going to visit the Summer Palace this Saturday.

Many grocery stores use misting, a process ________ vegetables are sprayed with water, to keep vegetable fresh.

The price of a cup of coffee is higher than _______ of a glass of Cola.