Question

Read the short text and complete the gaps with the appropriate prepositions, then mark the right alternative. Perms and hair dyes linked to concerning compounds in a new study, hairdressers who often used light colored hair dyes or hair-waving products (1) ___________ clients had more potentially cancer-causing compounds (2) __________ their blood than hairdressers who used the chemicals less frequently. The study included hairdressers as well as women who used hair dyes on themselves and some who had never used them at all, and none of the women had actually been diagnosed with cancer. The world health organization considers hairdressing work probably carcinogenic, since hairdressers tend to be (3) __________ higher risk for bladder cancer. The new results could help narrow down specifically where the cancer-causing agents are coming from

Answer 1

Resposta:

In a new study, hairdressers who often used light colored hair dyes or hair- waving products (1)ON clients had more potentially cancer-causing compounds (2)IN their blood than hairdressers who used the chemicals less frequently The study included hairdressers as well as women who used hair dyes on themselves and some who had never used them at all, and none of the women had actually been diagnosed with cancer The World Health Organization considers hairdressing work probably carcinogenic, since hairdressers tend to be 3)AT higher risk for cancer bladder The new results could help narrow down specifically where cancer-causing agents are coming from.

Explicação:

Prepositions

in - geral

on - more specific - mais específico

at - very specific - muito específico