Question 15 to 18 are based on this passage
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Complete the table below.Write ONE WORD AND/OR A NUMBER for each answer

While most of the tasks undertaken by the interns were undemanding, a fact that led to the flood of applicants for the positions each year, there was one duty: cleaning out the garbage bins in the laboratory.

a. unambiguous

b. facile

c. arduous

d. onerous

e. tenebrous

f. lucid

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