______ on the portrait, mother was deep in thought.
| A．Fixed her eyes | B．Her eyes are fixed |
| C．Her eyes fixing | D．With her eyes fixed |
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 |