It __be the vocabulary that caused you the problem in the exercise because you know a lot of words.
Julia is one of the women who always ________ the latest fashion.
--Must I turn off the gas after cooking? --Of course. You can never be ________ careful with that.
_____ it is you’ve found, you must give it back to the person it belongs to.
----- Can I help you? ----- I’d like to buy a present for my father’s birthday, ____ at a proper price, but of great value.
He was very busy, and ______ he didn’t go to the party that night.