In the library’s warehouse, robots would manage stock and fetch books ______.
A.on board B.on watch C.on demand D.on occasion
______ this approach is effective in losing weight, it is not as beneficial as keeping a balanced diet.
A.Once B.While C.Unless D.Until
Though lacking experience, Mike was convinced that he ______ a higher pay by working hard.
A.has got B.will get C.got D.would get
On the whole, frequently ______ in a wide variety of activities and older adults are less likely to feel depressed.
A.participate B.to participate C.participating D.participated
The manager has ______ several principles that he hopes will guide his employees in their work.
A.set in B.set off C.set out D.set aside
He pointed out such a crucial detail about the experiment ______ we could never neglect.
A.as B.that C.where D.when
