Contractions and colloquial expressions are acceptable in a formal report.
a. true
b. false

Answer : B. False
 
Contractions and colloquial expressions are deemed inappropriate in a formal report therefore, it is not acceptable. Contractions and colloquial expressions can only be used in casual discussions and exchange of ideas but not in a formal-report making. In making a formal report, you need to use the appropriate and formal words to convey your idea and establish the credibility and authenticity of your report. Contractions and colloquial expressions in a formal report may send a negative impression to the readers or listeners making the paper less credible.

Just pretend that your talking to a empty room