We will ______ all the natural resources if we continue consuming them like that.
| A．run out | B．wipe out | C．drop out | D．hold out |
Completing all the homework by the dinner, John felt very tired. He __________all day long.
| A．was studying | B．studies | C．has studied | D．had been studying |
Though working outside, he is always ________ about his aging mother at home.
| A．satisfied | B．concerned | C．particular | D．excited |
-------The weather is terrible now; our earth is badly damaged!
-------Yes. It’s urgent that everyone _________ spare no effort to do something to save our world .
| A．must | B．would | C．should | D．shall |
Because the writer fell ill all of a sudden, the novel _____________ by the end of next month was put off.
| A．being published | B．will be published | C．to be published | D．published |
The young dancers looked so charming in their beautiful clothes that we took _________ pictures of them.
| A．a good many of | B．masses of | C．the number of | D．a large amount |