Tourism is the ______ for the country’s economy, so its government tries its best to ______ both the natural scenery and the places of interest.
The number of the employees has grown from 1,000 to 1,200. This means it has risen ____20 percent.
Let's walk over ___the shop on the other side of the street.
_____most students, she was always well prepared and never came to class late.
The doctor will be free ____.
The boy ought to have gone to school ___, but he slept ___noon.