You can only be sure of_____you have at present;you cannot be sure of something_____you might get in the future.()
He has a _______ knowledge of animals.
You’d better put the milk in the fridge, which has a _______ to go bad in hot weather.
The Browns stood staring at the happy _______ of children playing in the park.
There are a number of words in the English language that were French in ______.
Mary was praised by the headmaster in public and on that _______ she was simply proud.