I am not certain, but there may...
Câu hỏi: I am not certain, but there may be about twenty applicants for the job.
A. I am not sure if there are about twenty applicants for the job.
B. At a guess, there are about twenty applicants for the job
C. I guess that there are twenty applicants for the job
D. Twenty people are guessed to have applied for the job
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