Choose the correct answer .
A mall is a building __________ you can do your shopping.
A night is the time of a day __________ it is dark outside.
A cookery book is a book __________ you can look up recipes.
A pickpocket is a person __________ steals purses from pockets and bags.
Carnivores are animals __________ live on meat.
An acronym is a word __________ is the opposite of another word.
Winter is the season of the year __________ it rains heavily. (where/when/who)