It was necessary to __________ the factory building as the company was doing more and more business.
All the teachers are against the idea to __________ the new teaching building beside the sports ground.
I am so busy that I have __________ unanswered letters.
Tina has been working so hard at English that she __________ the English exam.
Water can absorb and __________ a lot of heat without big changes in temperature, thus creating a stable environment.
He can't go traveling very often as his work __________ almost all his time.