Choose the correct collocation to make the sentence complete.

1 Charity shops welcome people’s ... which can be sold to raise money for their cause.
2 ... are available on many long distance flights.
3 Extreme ... are causing many problems all over the world due to global warming.
4 ... are difficult to understand for new users.
5 Supermarkets often have goods on display near the checkout that encourage ... .
6 ... are online message boards where users share information and ideas on a given subject.
7 Plastic ... are dangerous for very young children to play with.
8 Most students at university are on a ... and have to be careful with their money.
9 A ... lies behind all computer programmes.
10 The ... in major airports are designed to accommodate waiting passengers’ needs.