[ Grammar ]
Have you ever heard about the __________ of radioactive pollution?
A. affects
B. effects
C. cause
D. poison

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Vocabulary › ViewVindicate (VIN dih kayt)
A. Indict
B. To make old fashion
C. Accuse
D. Justify
Phrasal Verb › View
Choose the correct sentence in a classroom setting.
A. During the lecture, the professor would often call upon students to answer questions.
B. The student would call upon the librarian to help with research.
C. The students were asked to call upon the tutor for guidance.
D. The team decided to call upon a new project management strategy.