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

2. Over by the railroad tracks, there was a heap of ________ .

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

4. His mother forced him to ________ his homework every night after supper.

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

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

7. No matter how hard he pushed him, he couldn't ________ his son do the job properly.

8. He was confused and couldn't ________ up his mind about what to do next.

9. All of Chris' teachers agree that he is very good ________ math.

10. Karen is very jealous ________ Kim and it's very obvious to others.