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 |
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China has got a good ______for fighting against the flu with its careful and smooth organization.
| A．reputation | B．influence | C．impression | D．knowledge |
Many children，______ parents are away working in big cities，are taken good care of in the village.
| A．their | B．whose | C．of them | D．with whom |
Many children，______ parents are away working in big cities，are taken good care of in the village.
| A．their | B．whose | C．of them | D．with whom |
Some people who don't like to talk much are not necessarily shy；theyjust be quiet people.
| A． | must | B． | may  |
C． | should | D． | would |
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