—You are always full of _______.Can you tell me the secret?—Taking plenty of exercise every day.

A successful scientist needs _____ if he wants to make hypothesis (假设) of how processes work and how events take place.

 Have a ______ of these apples. They are sweet and delicious. 

My strongest __________ is the long race and came out first in the sports meet held last week.

The tragedy of the innocent young Brazilian boy killed by the British police has put the British police in a difficult________.