English Language · English
Which choice completes the text so that it conforms to the conventions of Standard English? The US Geological Survey wants to map every human-made structure in the United States, and it is asking volunteers to help. Cassie Tammy Wang and Ashish D'Souza are just two of the many volunteer map editors who ______ to the project since it began in 2012.
- 1will be contributing
- 2have contributed✓
- 3will contribute
- 4contribute
Correct answer
have contributed
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