1.He waited until it was dark()nobody could see him clearly.
A.so that B.in order to C.although D.however

2.The managers invited the public ()the opening of the new hotel.
A.at B.in C.to D.for

3.()to your foolish advice we lost the game.
A.As a result B.In the form of C.Thanks to

Thank very much for answering the questions.

1.He waited until it was dark()nobody could see him clearly.
A.so that B.in order to C.although D.however
选A.so that
so that引导目的状语从句,表示"以便.为了",so that的结果一般与前面主句有因果关系的.
翻译句子:为了不让别人清楚地看到他,他一直等到天黑.
这道题不可以选B.in order to,因为in order to后面跟的不会是句子.用C.although和D.however的话,意思不通.

2.The managers invited the public ()the opening of the new hotel.
A.at B.in C.to D.for
选C.to
public作名词时表示"公众,民众".
楼上说得不错,invite sb. to sp.邀请某人参加
翻译句子:经理们邀请公众参加新旅馆的开幕式.

3.()to your foolish advice we lost the game.
A.As a result B.In the form of C.Thanks to
选C.Thanks to
题目是不是多加了个"to"?!
Thanks to--幸亏
As a result--结果(不通)
In the form of--以...的形式

Thank very much for answering the questions.
把Thank改为Thanks或在Thank后加you.

楼上的回答正确,俺只是来补充下`哈哈,以上哪里错误或不明请提出`^_^