________ she couldn't understand was ________ fewer and fewer students showed interest in her lessons.

The day breaks，______ the birds are singing.

 How can school ban mobile phones completely __________ some of the parents simply don’t follow the rule?

______children get older, Doherty said, their brains may develop the ability to indentify visual  context. 

Some animals carry seeds from one place to another, ______ plants can spread to new places.