________ from the top, the city looks more beautiful.

One learns a language by making mistakes and________ them.

      good manners to say “Sorry” when you knock into someone but    no need to say it again and again .

This kind of picture stories    worth reading , but novels of that kind    not worth reading . 

Technology is developing so rapidly that   for only a year , my cellphone is out-of-date .

First he made a list of the names of those   .Then he began to write the invitation cards .

—Is it that Jack often plays computer games    makes his parents worry about him ?

—Yes , I think so .               

Now that she is out of a job, Lucy ______going back to school, but she hasn’t decided yet.

It is ten years ____he graduated from the university.

_______he grew older , he began to go deaf.