EASY ANSWER
Explain:
Are from “treadmill” in paragraph 5 mainly describes something _________
A. invigorating
B. beneficial
C. aliens
D. monotonous, boring
→ Treadmill: continuous reel = something very boring and monotonous
Based on the context in the sentence before it:
At the same time, they are employing others – cleaners, childminders, fast-food restaurant workers – in order to allow themselves to work all the time. Meanwhile, more and more of us are putting ourselves on the treadmill of constant activity, taking on an increasing heavy workload, and never stopping for a moment to ask ourselves why.
(At the same time, they are hiring other people – cleaners, babysitters, fast food restaurant workers – to allow themselves to work all the time. Meanwhile, more and more of us book himself into a constant stream of activity, shouldering an increasingly heavy workload, and never stopping for a moment to ask himself why.)
→ Choose the EASY answer