推拖飞机时，前起落架镜面高度不能超过多少？

We were all very worried over the fact _____ you were ill.

Do you doubt ________ I believe you ?

______ cleans the blackboard is to be praised.

Please put the magazines ______.

The question is ______ the film is worth seeing.

You talk as if you ___ there.

If I had known that, I ___ so.

The foreign tourists have visited many scenic spots in Shanghai, _____ as interpreter

Once _____ at the shop, you will be dismissed immediately.

What Yang Liwei wanted to do when he got out of the spaceship was _____ the joy with all the Chinese.