1. заполните пропуски предлогами. используйте предлоги: with, for, in, at, of i work … machinoexport. a lot .. foreign firms are interested in doing business… us. we have made some contracts … boilers … a new model lately. our boilers are … great demand now and we sell them … high prices.

 I work for Machinoexport. A lot of foreign firms are interested in doing business with us. We have made some contracts with boilers in  a new model lately. Our boilers are … great demand now and we sell them for high prices.