_______, I think, and the problem could be settled,
| A．If you don’t doubt your efforts | B．So long as you keep up your spirits |
| C．Making great efforts | D．A bit more efforts |
rise in carbon dioxide is causingsteady increase in global warming.
| A．The; a | B．不填; a | C．The; 不填 | D．A；the |
We should get prepared for dealing with ________problems_________.
| A．any,arise | B．which,are arisen | C．whatever,arise | D．what,are arisen |
---You’ve read the Frog by Moyan,haven’t you?
---Yes,I_______second time and I got a better understanding.
| A．have read a | B．had read the | C．will read the | D．read a |
We’ll never forget this terrible accident and the damage_______has caused to the area.
| A．that | B．what | C．it | D．one |
--- You ought to have given them some advice.
--- , but who cared what I asked?
| A．I ought to | B．So I ought | C．So it was | D．So I did |