One of the main themes of the summit was “sustainable development”,or the question _________ we can continue developing the world without damaging the environment.
| A．what | B．how | C．why | D．that |
_____ it is a good thing I did not get the post I had applied for, though I must admit that I was disappointed at the time.
| A．By the way | B．In a way | C．In the way | D．In no way |
_____ inviting guests and not treating them properly!
| A．Strangely | B．Fantastically |
| C．Surprisingly | D．Fancy |
With sufficient scientific information a manned trip to Mars should be _____.
| A．obtainable | B．potential | C．considerable | D．feasible |
The generation _____ makes it difficult for parents to understand their children's opinions.
| A．division | B．gap | C．separation | D．interval |
If the boy had _____ the dog alone it wouldn't have bitten him.
| A．set | B．left | C．had | D．put |