16.Tom, the head teacher______to see you in his office. a.is wanting   b.is liking    c.wanted   d.would like 17.Thien Mu pagoda is attractive. I really enjoy______there a.visit    b.to visiting     c.to visit     d.the visit 18.Peter: What will you do at Ha Long Bay, Mary? Mary: I don't know._______. a.I may explore some vaves    b.I went mountain climbing   c.I am going to the cinema  d.I often go hiking there