She is a diligent student, and all her spare time she has _____ staying in the library.
He has determined to _________ loyal to his company no matter what happens.
It’s the present situation in poor areas that _________ much higher spending on education and training.
The classroom is big enough _________, but we’ll have to move if we have more students.
Green products are becoming more and more popular because they are environmentally _________.
—The sports meeting is due to be held next Monday. —_________ it rains? —Try to put it off.