Mike Perham,a 17-year-old British teenager, finished his solo round-the-world sailboat trip last week, becoming the youngest person in the world to that.
Shelly had practiced hard for the driving test so that she could be sure of passing it on her first_________.
Recently I bought an ancient Chinese painting, _________ was very reasonable.
The doctor did _______ he could ________ the little child.
Miss Chen can show you around _______ mountain, because she has ______ good knowledge of it.
The athletes competed ________ each other for gold medals in the Olympic Games.