16．Expressing gratitude shouldn’t be ______ reaction; it should be ______ state of mind.
A. a, / B. a, the C. /, a D. a, a
17. When women were right there with you _______ you had any money, it’s a pleasure to do ______ for them.
A. after, everything B. until, anything C. before, anything D. unless, something
18. Tom, _______ yourself. Have you already forgotten the rules I told you.
A. behave B. respect C. act D. entertain
