Flu is a very ______ infectious disease. Fever, headaches, coughing and fatigue are some of its ______ symptoms.
The woman told the workers that her house __________.
He made such __________ rapid progress in his job that before long he turned __________ director of the department.
An unhappy childhood may have some negative effects on a person's character; however, they are not always __________.
-How about this type of mobile phone? -__________. I'd prefer a 3G.
Henry goes to a free class every Sunday afternoon which __________ at 4 pm.