1) People -------- about the traffic even though they are somehow part of it, and this ------- for years. a) are complaining/ has been going on b) were complaining/goes on 2) Artists ---- the belief for a long time that a person's reaction to colour profoundly ---- their state of mind and emotional well-being. a) are holding/impacted b) have held/impacts 3) Today, many fitness centres -------- Zumba classes to their members, as the practice of Zumba ------- calorie burn. a) offer/promotes b) were offering/promoted 4) Recent studies --- that regular physical activity, such as jogging and swimming, ------- the risk of chronic diseases.  a) had shown/reduced b) have shown/reduces 5) Artificial intelligence applications in the healthcare industry ---- a lot since hospitals ---- to use them in the early 2000s. a) were progressing/ had started b) have progressed/started

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