Here you have pairs of sentences . The first of each pair is informal, conversational in style.
If you had to write the same thing, or speak to a group about it, you would probably need a more formal style.
An example of each is given but there are missing words.
Your task here is to find words with more formal usage appropriate to
the second version of each sentence and to fill the gaps..
NB There are other acceptable words which the author hasn't included in the list but may be accepted by the exercise - others may be just as good but we may not have thought of them so - ask your teacher.
If you need a word list from which to choose an answer,
click here