我作文好似成日用commas 咁.......以下句子的commas 是必要的嗎~?
1. Hong Kong is a free trade city, adopting a low tax policy, which lead to tremendous foreign investors into Hong Kong to do business.
2.Hong Kong, such a tiny city, should(竟)contain about 700,000 people, which seems to be a tinned sardine fish.
3.With such keen competition, including local as well as foreign companies, selling substandard good or charging at an unreasonably high price,probably, is an insensible decision for companies.