How to tackle gap questions:
1. Read the part of the text before the gap.
2. Read the part of the text after the gap.
3. What kind of word is missing (noun, verb, adjective, adverb, preposition).
4. Write down the word (or words) which you believe fits the gap best.
5. Compare your own option with the answers given (a,b,c,d?).
6. Select the answer which resembles your own answer the most.
7. If you can’t find find a matching answer, start the process again.