His letter was so confusing that I could hardly make any ________ of it.
| A．explanation | B．meaning | C．sense | D．guess |
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 |
After living in America for over 20 years, Brother Sway said to a reporter the other day, “I ________ done bigger things, had bigger achievements had I stayed in China.” .
| A．must do | B．could do | C．could have done | D．must have done |