题目内容
(同位语从句)用适当的连接代词或连接副词填空
There's great doubt ________ he did so or not．
I have no idea ________ he will return．
I have no information ________ he went camping last Sunday．
He expressed the opinion ________ Tom should be made manager of the factory．
The problem is ________ they have run out of food．
There's no doubt ________ he was killed in the accident．
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