She is worried because a lot of reefs are …….
A. Doing research
Some vs. Any Good vs. Well Cleanup vs. Clean UpGrammar: Defining Relative ClausesArticles & Compound NounsPast simple regular verbsLinking VerbsRegular and Irregular VerbsTenses Practice
Other quiz: Grammar
Effective speaking ___________on effective listening.
How to use : Read the question carefully, then select one of the answers button.