Direction: The sentences given with blanks are to be filled with appropriate word(s). Four alternatives are suggested for each question. For each question, choose the correct alternative corresponding to it.
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Since last year his condition has been _____
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- deteriorate.
- deteriorating.
- severely deteriorated.
- deterioratingly.
- deteriorate.
Correct Option: B
Subject + has/ have + been + V-ing is the right structure.
Hence, deteriorating is the right option.