Rewrite the following sentences placing any necessary commas or semi-colons:

1. There was no question that John's painting a huge colorful and ugly mural was the worst entry in the art exhibit.

2. Werner von Braun Willy Ley and Edward Teller noted authorities in the field of rocket development have done much to guide the missile program of the United States.

3. To get tickets for some Broadway musicals one has to order three months in advance.

4. Listening to the radio Jun heard an announcement that Spangler his own dog was lost.

5. I often go to the seashore and collect rocks there.

6. Before reaching the summit the climbers were forced by a storm to turn back.

7. The house was clean, the table set, and the porch light on everything was ready for the guests' arrival.

8. He looked carefully in the underbrush but he failed to notice the pair of green eyes staring at him.

9. The foundations of the house had been poured but, to his disappointment, nothing else had been done because of the carpenters' strike.

10. The computer could perform millions of operations in a split second however, it could not think spontaneously.