a)
1 vending
2 jangle
3 foreseeable
4 migrant
5 bustling
6 wheeling
b) (Suggested Answer)
1 I buy a bar of chocolate from the vending machine every day.
2 The airport will remain closed for the foreseeable future.
3 Lots of migrant workers are employed at the factory.
4 The airport was full of bustling passengers.