1 . These measures will _________ cost of production.（用适当的词填空）

2 . 按要求写出所给词的词形变化
1. prefer—(过去分词)___________、(n.偏爱)______________
2. compete—(n.竞争)___________、(adj.竞争的)______________
3. curious—(n.好奇)______________
4. silent—(n.沉默)______________
5. apply—(过去分词)___________、(n.申请书)_________、(n.申请人)______________
6. grow—(过去式)___________、(过去分词)___________、(n.成长)______________
7. agree—(反义词)___________、(n.同意)______________
8. create—(adj.有创造力的)_________、(n.创造)___________
9. enter—(n.入口、进入)______________
10. permit—(过去分词)___________、(现在分词)___________、(n.允许)______________
11. occasion—(adv.)___________
12. success—(v.成功)___________、(adj.成功的)______________
13. attract—(n.吸引)___________、(adj.吸引人的)______________