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 |
He would rather_______his life than_______damage done to state property.
| A．lose,to see | B．to lose,see | C．to lose,to see | D．lose,see |
Although the working mother is very busy, she still______a lot of time to children.
| A．devotes | B．spends | C．takes | D．provides |
.We consider__________the Great Wall this summer holidays.
| A．to consider | B．visit | C．to be visiting | D．visiting |
.Three-fourths of the surface of the earth_________sea.
| A．is | B．are | C．were | D．has been |
Mary as well as her sisters____________Chinese in China.
| A．are studying | B．have studied | C．studies | D．study |