The cousins are alike in age，but ________ they are asdifferent as day and night.

You must be aware ______the fact that it is ____ great importance to learn English well

_____not to miss the flight at 15:20, themanager set out for the airport in a hurry [ ]

this your family—Yes, these are my parents and those my brothers.

South Korean rapper Psy’s hit song “Gangnam Style” made_______history on Dec. 20th as _______first ever video on YouTube to reach 1 billion views.