Fill in the blanks with the following words.burdensometediouscompulsoryoptional1. Traveling will never be _____________ in this nature reserve because there are breath-taking sceneries all the time.2. Business trips are mostly _____________. Meanwhile, the schedule is always full.3. The travel agency offers quiet a few ____________ fascinating destinations for the tourists.4. Making preparations for a family trip is definitely a __________ task for a mother of three kids, since there is a long list of items.