2. Вставьте пропущенные предлоги и союзы, где это необходимо. 1. The more goods are swapped … other goods and services, the more effort is wasted to find those … whom these swaps can be swaps can be made.
2. … 1960 and 1985, UK exports as a share … the GNP is reported to have risen … 20 percent … nearly 30 percent.
3. Exchange may take the form … barter in which goods or services are traded directly … other goods or services.
4. The firm is known to have been trading … jewellery … over a hundred years.
5. Goods and services are sold … money and the latter is to its turn exchanged … other goods and services.
6. New forms … money are known to have been developed … the development … the banking system.

1. Anna WAS LOOKING at the departure board while the twins WERE STANDING in the queue. (Past Continuous, так как мы говорим об одновременных действиях + есть слово-подсказка while (пока/в то время как)

2. Eram DIDN'T HAVE anywhere to live.

(Past Simple, т. к. говорится о каком-то моменте в )

3. Daniel WAS SHOWING the tribesmen round the park when they STARTED hunting squirrels.

(Past Continuous и Past Simple, так как несколько действий в происходили в одно время.)

4. Max HAD already BEEN WAITING for six hours, before they ANNOUNCED the reason for the delay.

(Past Perfect Continuous, так как есть слово-подсказка: for (в течение…) и идет обозначение первичного действия, т.е. которое началось раньше;второй глагол в Past Simple, так как какое-то действие произошло в )

Can computers be characterized, as very comfortable, reliable and accurate? (Общий)
How can you characterize computers? (Вопросительный)
Computers can be characterized, as very comfortable, reliable and accurate, isn’t it? (Разделительный)
Can computers be characterized, as very comfortable or reliable and accurate ?(альтернативный)
Computers can be characterized, as very comfortable, reliable and accurate! ((Утвердительный)
не знаю как строить утвердительный вопрос, может это просто должен быть восклицательный знак, если , отметь этот ответ как «лучший»