Professor Smith, along with his assistants, _____ on the project day and night to meet the deadline.
That hall is________ this one. Let's go to ________ one.
It may have been unusually cold recently but experts say it's ________ for this time of year.
—How do you react ________your father's suggestion?—I reacted strongly ________it.
Only when he reached the teahouse________it was the same place he'd been in last year.
The explorers were told to ________ themselves with everything they would need for the voyage.