The research report published last month is very important______ it confirms the link between aggression and alcohol.
His disappearance(失踪)______ by the police.
The government tried ____ they could ____ the people in Yushu
Former IOC (the International Olympic Committee) president Samaranch’s death is believed ____ by heart attack.
It is suggested that he _______ a doctor at once.
_____ I failed in the examination again drove my mother mad.