If we can convince young people _____, they might then urge their parents and other people ____ smoking, too.

It is believed to _____ over by sandstorms from AD 200 to AD 400.

We want to shock people into ____ that many smokers die all too soon from illness and diseases _____ smoking.

George Gould too visited the tomb, ____ a high fever the next day.

Below ____ an article about advertisements ____ by a student for her English project.

If ____ in, viruses can result in illness or even death.

 The situation is hard to _______, because he isn’t a man easy to _______.

 He felt his pocket only _______ the money nowhere.

 He caught the train with a few minutes _______.

Tom kept quiet about the accident　　　 lose his job.

_________as one of the most important inventions of the time, the computer helps people living in different countries to do a lot of things.

Tell Mary there is someone __________ for her at the door.

Earth is believed ______ by an object the size of Mars at some point in the distant past before itssurface cooled.

With temperature ______ so rapidly, we could not go with the experiment.

          in the fields on a March afternoon, he could feel the warmth of spring.

 If you keep on doing stupid things like this, you'll get _______ someday!

 When the man came in, gun in hand, we all stood there, ________.

 I didn't imagine              a writer in my childhood.

In the reading room, we found him     at a desk, with his attention      on a book.

So many problems ________， he is having a difficult time.