Although they are divorced, he still has regular _______ to the children.

 As nobody here knows what is wrong with the machine, we must send for an engineer to _______ the problem.

Rather than sticking to the principles stubbornly, China is now adopting a new concept in economic policies in a/an _______way that shows its own characteristics.

Rudolph just stood there，saying nothing．_________ he was a man of few words．

 I think it _____ that she should be knowledgeable about computers for her present job.