Up to Tuesday's attack, the worst school shooting in the U．S．was in March 1998 in Jonesboro, two boys, aged 11 and 13, shot and killed a teacher and four girls．
| A．while | B．where | C．when | D．then |
Children areto meet with setbacks as they grow up, so their parents don’t have to worry about it.
| A．reasonable | B．stable | C．bound | D．skilful |
You’d better let each student read his own tastes and choices.
| A．in need of | B．in favor of |
| C．in terms of | D．in spite of |
The activity is held annually in Chinatown with the purpose of the Chinese tradition.
| A．keeping off | B．keeping up |
| C．keeping back | D．keeping out |
—Wow, where is my purse?
---! We will be late for the picnic.
| A．Come on | B．Don’t worry |
| C．Take your time | D．Take it easy |
It is not always easy for the public to see _______ use a new invention can be of to human life.
| A．whose | B．what | C．which | D．that |