TOEFL Grammar - Find the error

ScottsEnglishScottsEnglish Administrator Posts: 1,296 admin ✭✭✭✭✭✭✭

Find the error.


There are 4 underlined sections in the text below. Select the one which is wrong.

While the development of antibiotics have helped lower the risk of bacterial infection, viruses continue to resist any possible treatment.

A. development
B. have
C. infection
D. resist

While the development of antibiotics has helped lower the risk of bacterial infection, viruses continue to resist any possible treatment.

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