2. Перепишите предложения, заполняя пропуски необходимыми предлогами. Переведите предложения на русский язык.

1. Our costs were fixed ... some period ... time. Did he offer ... solutions for this problem?
2. Their Finance Manager has to examine the percentage change ... quantity.
3. To provide scope ... further research, we should look … new business partners.
4. ... this stage, I suppose, we shouldn't change our machinery … this considerable extend.
5. Your American colleagues are greatly concerned ... our technical co-operation … Iraq.
6. … fact, people purchase and sell their goods and services ... exchange ... money