23. It is recently found that two colleagues who are ( ) basketball fans or share a fascination with rare books are more likely to swap information on work.

17.One can never be happy if one is always envious ( ) others.

16.My mother (would have been) in Beijing by now if she had not missed the train. The underlined part in the sentence expresses a(n) ( ).

15.If you (would) kindly agree to the terms, we'll send you the samples right away. The underlined word indicates ( ).

14.A more flexible means of communication is always an advantage, ( ) being equal.

13. What leaves me with the deepest impression in the park is a(n)( ) trunk.

12. Lisa managed to save ( ) she could out of her low wages to help her sister.

11. She thought it advisable that a janitor ( ) against any possible intruder.

30. They normally ( ) one of their three arguments when criticizing their opponents.

29. The overall economic ( ) for the newly emerging economy is very promising.

28. She often let the children play in the yard to keep them out of ( ).