One way to understand thousands of new words is to gain good knowledge of basic word formation.
There are too many difficulties for us __________. Wereally don't know __________ to do.
You'll find taxis waiting at the bus station __________ you can hire to reach your host family.
Thetest measures mathematical __________.
This piece of news was __________ economic and social problems.
Most staff are against the new rules, but they have come into being __________.