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 |
— Have you known each other for long?
— Not very, ________we started to work in the ABC Motor Company.
| A．before | B．since | C．when | D．after |
— is Miss Wang in the office today?
— No, she's gone to her hometown _____the Spring Festival and she'll be back in a week .
| A．in | B．during | C．for | D．on |
— Are you waiting for a bus from the office of the City Government?
— Yes. I arrived here at the bus stop ten minutes ago, but the bus________.
| A．hadn't come | B．won't come | C．didn't come | D．hasn't come |
The village ________ we see today is no longer ________ it was a decade ago.
| A．that; that | B．which; how | C．/; what | D．what; which |
— The winner of the race is a tall and thin boy with thick glasses.
— Then it ________ be my friend, Mike, who looks like a "meat ball".
| A．mustn't | B．can't | C．might | D．should |