Oil prices have risen by 32 percent since the start of the year，________ a record US $57.65 a barrel on April 4.
A．have reached B．reaching
C．to reach D．to be reaching
He hurried to the booking office only ________ that all the tickets has been sold out.
A．to be told B．to tell C．told D．telling
—Can those ________ at the back of the classroom hear me?
—No problem.
A．seat B．sit C．seated D．sat
Reading is an experience quite different from watching TV; there are pictures ________ in your mind instead of before your eyes.
A．to form B．form
C．forming D．having formed
—The last one ________ pays the meal.
—Agreed!
A．arrived B．arrives C．to arrive D．arriving
If water becomes increasingly scarce in decades ________，water shortage will become a hot issue all over the world.
A．coming B．having come
C．to come D．to be coming
