–Are you a teacher?
--No, but I ________.
| A．used to | B．was used to | C．used to be | D．used to do |
_____ the three deaths in the region, one person was also left missing from the April 25 sandstorm.
| A．In spite of | B．Apart from | C．Separate from | D．Regardless of |
It is reported that the number of graduate students who___ mental problems ___on the rise.
| A．have ; is | B．has; are | C．has; is | D．have; are |
Choosing to visit the Shanghai Expo on a late afternoon can make you see two to three times as many of the most popular pavilions between 6 pm and closing time ____ you hurry.
| A．when | B．unless | C．where | D．if |
China will have to consider _____ it wants to be viewed by the rest of the world when it exercises its influence as a major power.
| A．when | B．how | C．what | D．which |
Easter Island, which was almost uninhabited when it was discovered on Easter Day in 1722 by a Dutch captain, is covered with hundreds of giant statues, each _______ several tons.
| A．weighing | B．weighs | C．weighed | D．to weigh |