6. astronaut　 7. explanation　sidering　　 9.smoothly　 10.occupied

10.When I arrived I saw the place was already __________ (传播)by two strangers in uniforms. 10.___________

Keys: 1. December　 2.freezing　　 3. necklace　　 4. examined　　 5. prevent

9.To be honest, it will take about three hours if everything goes________(顺利) . 　9.____________

8.You managed the project well, _________(考虑到) your inexperience.. 　　　 8.____________

7. There are some notes and _________(解释) after the text.　　　　 　　　　　7.____________

6. The _________(宇航员) landed on the moon.　　　　　　　　　 　　　　　6.____________

5. We must p________ the factories from sending out bad gases.　　　 　　　　　5.____________

4. He went to the hospital last Sunday and had his eyes e__________.　 　　　　　4.____________

3. She went to the party with a n________ around her neck.　　　　　 　　　　3.____________

2.These poor children have to go out for food in ________(冰冻的) weather.　 　　2.____________