Not until I began to work did I realize how much time I （ ）.

Five hundred and fifty pounds （ ） too unreasonable a price for a second-hand car.

The tall tree, （ ） leaves are darker than those of the other two, is as old as grandpa.

（ ） some mammals came to live in the sea is now known.

Education is not an end but a(n)_____to an end.

（ ） from space, our earth, with water covering 70% of its surface, appears as a “blue planet”.

We arranged to meet at the station but she did not （ ）.

Hardly （ ） how I passed the interview.

As far as the professor（ ） , college students should get into the habit of studying by themselves.

The young man still denies _____ the fire behind the store.

However much （ ）, it will be worth the money.

Fast food doesn’t seem like a good idea, for it is （ ）.