Replace clauses in bold type by participle constructions: (в скобках)
1. We were pleased to receive from you the enquiries (which were mentioned above)
2. I was impressed by the technical knowledge (which was shown by your specialists in Kyiv).
3. We expect to receive all the materials (which were ordered during the first half of yhe year)/
4. They will provide the parts at the prices (which were quoted in their latest offer).
5, We had to change the wording of the clause (which was proposed by you).