We can see many examples in our life _____ positive thinking changes a person completely.
Meals in Spain are quite different from ________ they have in China.
________ seems to be a strong competition in China for senior high students to enter universities does exist in other countries as well.
Before the problem can be solved,it must be obvious ________ the problem itself is.(2011·湖南,31)
His writing is so confusing that it's difficult to make out ________ it is he is trying to express.(2011·安徽,33)
It is by no means clear ________ the president can do to end the strike.(2012·新课标全国)