Откройте скобки ,используя глагол в правильной форме. а. you (to be) to our plant? b. yes, we have. how long it ( to take) you to construct it? a. three years. b. when you ( to construct) the plant? a. four years ago. since that time many firms (to place) large orders for our eguipment. b. your eguipment is really good. we (to see) your eguipment in operation. we (to be going) to place an order with you too.