Maggie is a neat and tidy student, who likes to have everything ______.
---Mary has been trained hard for the last two years. ---______ she did so well at the track and field meet yesterday.
When ______ comes to research into heart disease and its effects on the body, we do not have adequate substitutes for the use of animals.
One of the best ways for people to keep fit is to ______ healthy eating habits.
The building around the corner caught fire last night. The police are now ______ the matter.
A survey was carried out on the sleep time of students in middle schools, ______ were surprising.