Практикум по синхронному переводу с русского языка на английский

западного инвестора — in English this sounds better in the plural,
particularly since this is a long sentence. Otherwise it begins to sound like
a long description of a particular individual.

5. 
   на цивилизованное законодательство — while "civilized" is logically a
   correct translation, "sound" or "acceptable" are a bit better here.
   "Civilized" sounds a bit patronizing.
   

5. 
   в Москве эти вопросы решены достаточно положительно, о чем сви­
   детельствует практика и опыт многочисленных зарубежных инвесторов —
   once again, the interpreter will have a much easier time with the sentence
   if the prepositional phrase "в Москве" is made into a nominative subject:
   "Moscow has resolved these issues." "О чем свидетельствует" can also
   be turned around to begin the clause with a nominative: "This is
   demonstrated by..." "Практика и опыт" are tautologies, and can perfectly
   well be translated by one word, "experience."
   

5. 
   не покинули это поле, а, наоборот, расширили свою сферу деятель­
   ности — this can translate as a singular, but then all three subjects need
   to be in the singular: "Not a single foreign entrepreneur, company or firm
   has abandoned such activity/its efforts." "Field" is not a good translation
   for "поле" here. The sentence can be continued by subsuming наоборот
   into "rather, there has been expansion of such efforts," instead of starting
   on a longer construction with "on the contrary," which would require a
   reiteration of the subject, i.e. "on the contrary, these firms have been
   expanding their activity..."
   

10.