英语翻译我认为他不太可能会在英语竞赛中获一等奖（possibility）很难想象许多父母是董事长的美国大学生业余时间经常

我认为他不太可能会在英语竞赛中获一等奖（possibility）
I don't think there is any possibility that he can get the first prize in the English contest.
很难想象许多父母是董事长的美国大学生业余时间经常打工（imagine）
It's hard to imagine that many American college students whose parents are board managers often go to work in their spare time.
我推测：既然她没有回信给我,她一定是生我气了（reason）
Since she haven't replied my letter, the reason I could guess is that she must have been angry with me.
每当我爷爷看到这张照片,就会想起50年前举行的这次会议（remind）
Every time my grandpa looked at this photo, it would remind him of the conference held 50 years ago.