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1.Are there many reasons to go on a business trip? 2. Why are there many reasons to go on a business trip? 3. There are many reasons to go on a business trip, aren't there? 4. Are there many reasons to go or not to go on a business trip? There are not many reasons to go on a business trip. 1. May personal belongings be brought in duty-free? 2. What may be brought in duty-free? 3.May personal belongings or pets be brought in duty — free? 4. As a rule personal belongings may be brought in duty-free, may not they? As a rule personal belongings may not be brought in duty-free.