It is not such the language_________the cultural background ___________ makes the book difficult to understand.[ ]

How many people came to Brazil for the World Cup in 2014—It is hard to say. ______ people, I think.

Linda, is there anything else you want to know about China—Yes, I am still wondering _____________.

Will AIDS patients ______ the new drug and be cured eventually

Are you cleaning my roomI can’t help _____ I can’t bear seeingpeople’s room in a mess!