6 Underline the correct words in the brackets: (1) Goods sold to other countries, such as food, cars, machines, medi-
cines, books, musical instruments, cassettes, discs and many oth-
ers, are (visible, Invisible) exports.
(2) Services, such as insurance, freight, tourism, technical expertise,
medical operations and others sold to other countries are invisible
(imports, exports).
(3) The difference between total earnings of a country and its total
expenditure is called its balance of payments, trade).
(4) The difference between a country's earnings for its visible exports
and expenditure for its visible imports is called its balance of pay-
ments, trade).
(5) The difference between a country's GNP and its total expenditure
is called its balance of payments, trade).
(6) The total amount of money a country earns including exports, for
a certain period of time, is called (GDP, GNA).
(7) The amount of money a country earns for goods and services in-
side the country is called (GDP, GNP).
(8) If a country sells more goods than it buys it will have a (deficit,
surplus)​