“I was touched by the children here who called me ‘Grandpa Wen’ because that’s _______the Chinese children call me at home,” said former premier Wen Jiabao in India．

Our country ______ great changes in the last 30 years and it is no longer        it used to be.

He kept yawning in class this morning. That is _____ he stayed up late doing his homework last night.

What made my father satisfied was　　　over 50% of the students in his class had been admitted to key universities. 

The present question is ____ many students consider it impossible ____ is really possible if effort is made.