—Who is ________ English teacher?—Well, it's Mrs.Green.She teaches ________ English very well.  

. --- Sarah said she wrote you a letter. --- I wonder ______ she is writing to me about.

It rained heavily this morning, but _______ of my classmates were away from school.

I’d rather ride a bike as bike riding has _____ of the trouble of taking buses.

Some foreign media predict that all these reforms will make China a strong and powerful country,  ______ that can surprise the whole world.