A．Because Canada was influenced by the French government．
B．Because Canada had poor crops and lacked employment．
C．Because Canada was politically turbulent．
D．Because Canada had a bad climate．
A．Because they shared one road．
B．Because there wasn't a border post．
C．Because of the strong French influence．
D．Because immigration went in both directions．
A．Common but realistic．
B．Simple but important．
C．Old but classic．
D．Boring but practical．