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 |
Rescuers are still searching for the other 19 missing miners, _______survival chances are small.
| A．who | B．which | C．whom | D．whose |
After living in New York for 30 years, he returned to his hometown ______he was brought up by his uncle.
| A．which | B．where | C．that | D．when |
I had just started back for the house to change my clothes _____I heard my name called.
| A．as | B．for | C．while | D．when |
It is an interesting story and one can't put it down _____ one has finished reading it.
| A．after | B．when | C．since | D．until |
I have been keeping the portrait _____ I can see it every day, as it always reminds me of my childhood in Paris.
| A．since | B．where | C．as | D．if |