79. Such a grammar mistake is ______ among the beginners of English study.
| A．normal | B．common | C．general | D．Ordinary |
Although they are very busy, our parents still _______ a lot of time to us.
| A．devote | B．offer | C．spend | D．provide |
If you are able to talk to a friend over the telephone, you feel that you are close ______ the actual distance is not shortened.
| A．even if | B．as if | C．so long as | D．as |
There was a big rock on the road, which the traffic.
| A．set back | B．stood back | C．kept down | D．held up |
Comparison may make something appear more beautiful than it is when alone.
| A．to see | B．seeing | C．is seen | D．seen |
He traveled to many mountain villages and saw many poor children out of school. This experience his life.
| A．would change | B．had changed | C．was to change | D．was changing |