1. The teacher suggested they ________ another exercise to understand the problem better.

2. Ralph was late ________ work again. He may be fired.

3. No one knows why he ________ those terrible things in the past.

4. To get a job as a secretary, you must be good ________ typing and answering phones.

5. The university research department stumbled upon something new and ________ a big discovery because of it.

6. Such bad behavior is typical ________ the spoiled child.

7. His teacher begged him to ________ more of an effort in class.

8. Mary is so pleased ________ her students' grades this past year.

9. In the distance, the onlookers could see a fleet of ________ .

10. The boys gathered a bundle of ________ .