He traveled all over the world ______ he had a man-made leg.
---- This place used to be full of trees, ___ it? ---- Yes. But now it has turned into buildings.
I will try to avoid ___ the same mistake.
---- Li Na is really a super tennis player in the world. ---- Yes. We were so ___ her when she won the Australian Open tennis tournament.
---- Baseball is a popular game among students in Taipei ---- Really? But it is unpopular in our city. Students ___ play it.
The top of the mountain ___ with snow.