John can finish this task quickly ______ using better methods.
22. “How long do you suppose it is _______ he left for Japan?” “No more than half a month.”
21. Mr Zhang is mild in character. He never shouts ____ he is very angry.
20. John shut everybody out of the kitchen _______ he could prepare his grand surprise for the party.
19. _______ rich one may be there is always something one wants.
18. _______ I can see, there is only one possible way to keep away from the danger.