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.