Complete the sentences below, then choose an alternative:
“________ the years and ________ the world, the scientists
have been doing ___________ researches about many
diseases, __________ in many cases they haven´t had enough
money to do it”.
Complete the sentences below, then choose an alternative:
“________ the years and ________ the world, the scientists
have been doing ___________ researches about many
diseases, __________ in many cases they haven´t had enough
money to do it”.
