一．错题回顾
1．Once _______ a difficult and even dangerous place ______, Vietnam is now a friendly destination that welcomes visitors from all over the world.
A. considered; visiting B. considered; to visit
C. considering; visiting D. considering; to visit
2. Mr Li is such a considerate person _______ all his colleagues like to work with.
A. that B. so C. which D. as
