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
If there is a lot of work ________， I'm happy to just keep on until it is finished.
A．to do B．to be doing
C．done D．doing
To learn English well, we should find opportunities to hear English ________ as much as we can.
A．speak B．speaking C．spoken D．to speak
A cook will be immediately fired if he was found ________ in kitchen.
A．smoke B．smoking C．to smoke D．smoked
