Answer:
(a) His prospects were not very promising.
(b) As chairman of three companies, he possessed unique experience.
(c) The circumstances do not justify an advance of more than 5,000.
(d) The company has a monopoly of the market.
(e) We were warmly welcomed as soon as we entered the room.
(f) Descending the staircase, she slipped and hurt herself.
(g) The repairs you asked us to carry out are now completed.
(h) The production of bluetooth tapes has now reached perfection.
(i) We enclose a copy of the report.
(j) We managed to trace the source of the quotation.
Step-by-step explanation: