Ⅰ.单词拼写
1．________ (幸运的是), no one was hurt on the plane, which later landed safely in the city's airport.
2．The ocean is home to a whale and a ________ (鲨鱼).
3．People keep a dog to ________ (吓唬) away thieves.
4．He took a deep breath and ________ (潜水) into the lake.
5．The company has ________ (以……为目标) adults as its primary customers.
6．The greatest discovery of all time is that a person can change his future by merely changing his ________ (态度)．
