Scientists doubt wheth er it ’s ________ to regulate one ’s biological clock by drinking.

TheWesternCouncilforTravelResearchin_______employedthetermvisitor.

Why couldn ’t you ________ an answer when I asked you why you were late?

Which of the folloing is NOT included in the fabled Five Mountains in China?

In 1985,_______ became the first international hotel company to open a hotel in China bearing its own name.