用句中黑体字的正确形式填空。

1．Honestly, I've been doubting his ________.

2．Nowadays, competition exists everywhere. It's no easy for a business to take the lead

   in the ________ world markets.

3．Besides physical fitness, all the parents hope their children will develop properly

   mentally as well as ________.

4．All his relatives ________ to the crime have been brought to the police station.

5．We have put an advertisement in the newspaper,________ for college graduates with

   computer skills.