The London 2012 Olympic Games marked the third time that London ______ the right to host the modern Olympic

In nature some animals actively defend the area ____they depend for the resources.

SEOUL – Samsung Electronics, the world’s largest smartphone maker, said Thursday that it has sold more than 10 million units of Galaxy S4, in ______ a month since its debut (首次亮相).

9.Loulan City is not at all__________a traveler who has never seen the desert before can expect

How long has Robert ___________ —Since 2004.