单句语法填空
1．John was dismissed last week because of his casual attitude to/towards his job.
2．You can leave the work in the charge of him，for he is always cautious(caution)about everything，and never makes any mistakes.
3．—Jack got drowned in the lake and was in hospital yesterday.
—Sorry to hear that.I'm told he often goes swimming alone regardless of his mother's objection.
4．We are at your service.Don't hesitate to turn(turn)to us if you have any further problems.
5．—Have you heard of the news that some bad guys set fire to the city hall and caused a lot of damage last night?
—Yes，and I'm wondering how the police will respond to the accident.
