Complete the sentences with the words in the box. There are two extra words

Complete the sentences with the words in the box. There are two extra words
which you do not need to use.
inventions | reduction | arrangements | operation |
connection | protection | communication | improvement
1. There has been a marked _______________ in Darren’s school marks in the last
year.
2. It took John two weeks to recover from his knee _______________.
3. Some people believe that there is a _______________ between wealth and
happiness.