THERE ARE MORE THAN 20 ________ WORKING ON THE WATER TREATMENT PROJ...

Question

5. There are more than 20 ________ working on the water treatment project. A. researches    B. researching    C. researchers    D. research

Answer

5. There are more than 20 ________ working on the water treatment project. A. researches    B. researching    C. researchers    D. research