1. (2017九下·盐都开学考) 根据句意用所给的单词的适当形式填空。

1. （1） This success marked the new in his career.(begin)
3. （2） If you tell the ， you don't have to remember anything.(true)
5. （3） If we roll up our sleeves to work harder， we will succeed.(sure)
7. （4） Joseph decided to in the army after he graduated from the school. (service)
9. （5） Growing vegetables is really an exciting and experience for kids. (usual)