He seemed to be looking for the words ____ he could express his idea.

—I drove to Shanghai for the 2010 Expo last week.
— Is that_____  you had a few days off?

This depends upon      he is interested in doing this kind of work.

I was about to leave the office      an unexpected visitors came.

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Not ____ he died, he received an award for his selfless service to the old.

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It is none of your business ___ other people think about you. Believe yourself.

_____ I admit that there are problems, I don't' think that they cannot be solved.

  Even though they are not doubtful at all _______ John will pass the exam, I still wonder ______ he is fully prepared.

  Tim is always lying, thus no one will believe _______ he says.

________ many changes have _______, we should keep pace with the changes too.