单项选择题 If you couldn't attend either of the concerts and are ______ gnashing your teeth at having missed out, don't despair.

单项选择题 Deals should be ______ not only on your satisfaction, but also on the incorporation papers, budget, rules, and other documents.

单项选择题 Some women, particularly those over 35 years of age, seem to be more ______ more serious problems such as clots in veins if they smoke heavily.