In _____ preparation for the launching of Shenzhou Ⅶ, scientists need ______ knowledge of weather changes.
His writing is so confusing that it's difficult to make out ________ it is he is trying to express.(2011·安徽)
The shocking news made me realize ________ terrible problems we would face.(2011·北京)
As many as five courses are provided,and you are free to choose ________ suits you best.(2012·陕西)
________ wants to stay in a hotel has to pay their own way.
It was never clear ________ the man hadn't reported the accident sooner.(2011·江苏)