1．The schools must________(采纳) new methods of teaching foreign languages.
2．He had been ill for a long time and c________he was behind in his work.
3．Although social responsibility may seem as an a________idea, managers consider it on a daily basis as they deal with real issues.
4．I have f________in you；I am sure you will do well.
5．“Good morning” is a c________greeting.
