e of fire, stay low to the ground in asmoky room, ________ smoke always rises towards the ceiling

The _______ scene inthe earthquake-stricken area made some people _______ .

I am quite busy________ weekends I have togo to English class_________ Sunday mornings and dancing class after lunch.

When ______ about the secret of his success, Steven Spielberg said that he owes much of his success and happiness ________ his wife and children.

The specialist, ______ some of his assistants, ____ to attend our discussion.