His writing is so confusing that it's difficult to make out ________ it is he is trying to express.(2011·安徽)

Before the problem can be solved，it must be obvious ________ the problem itself is.(2011·湖南，31)

It is by no means clear ________ the president can do to end the strike.(2012·新课标全国)

(2013·山东，30)It's good to know________the dogs will be well cared for while we're away.

(2013·北京，31)________makes the book so extraordinary is the creative imagination of the writer.

________ made the school proud was ________ more than 90% of the students had been admitted to key universities.

(2010·江苏)—I prefer shutting myself in and listening to music all day on Sundays.
—That's ________ I don't agree.You should have a more active life.

I'd like to start my own business—that's ________ I'd do if I had the money.(2011·江西)

As many as five courses are provided，and you are free to choose ________ suits you best.(2012·陕西)

We've offered her the job，but I don't know ________ she'll accept it.(2011·山东)