1. 选词填空

multiple   tend        focus    frustrating     types phase     encounter    grab    appetite       facility

1. （1） He died of injuries.
3. （2） The research effort has on tracing the effects of growing levels of five compounds.
5. （3） What recreational are now available?
7. （4） This autumn, 6000 residents will participate in the first of the project.
9. （5） The current situation is very for us.
11. （6） Did you anyone in the building?
13. （7） A problem for manufacturers is that lighter cars to be noisy.
15. （8） I managed to her hand.
17. （9） Someone's for something is their strong desire for it.
19. （10） There are various of the disease.