Eating too much fat can ________ heart disease and cause high blood pressure.
The policemen ______ the house again and again, and finally found the evidence.
Nobody but doctors, nurses or those ______ by Dr. Hu ______ to enter the patient's room.
-- Peter, set down the result of the experiment, ______?-- Oh, yes, but I need to find my pen first.
For quite ______ students, their teacher's advice is more important than ______ of their parents.
It is very important for us to employ a word or a phrase according to the ______ in language studies.