—How did you get in touch with the travel agent, Robin?
—Oh, that’s easy. I surfed the Internet and then called one ________ the telephone
number is provided.
| A．which | B．in which | C．of which | D．whose |
—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 |