The bus was due to __________ at 5 p. m.，but it arrived one hour late due to __________ by the heavy fog.

 After the long journey, the three of them went back home, ___________.

 Having said he would mend the clock, he discovered that he had not brought the _____ tools for the job.

I’m afraid I’m not ____ to help with the show, for I am fully occupied with my own project．

During the visit of German leader Angela Merkel to China, China offered _______ support for Europe, saying the aid would require “fully weighing risk”.