一.单句填空（每题1分，共10分）
1. These drugs are effective in the _________ (develop) stages of the disease.
2 . _________ (tradition), election campaigns start on Labor Day.
3. Ask Jack if he’s considering __________ (apply) for the Senior Manager’s post.
4. Banks have to think of ways of making long-term savings more _________ (attract) to individuals and business.
