判斷句子的主干屬于哪一種結(jié)構(gòu) A.(S+V)B.(S+V+P)C.(S+V+O.)D.(S+V+O+O.C)E.(S+V+I O+DO) Unfortunately,humans destroy animal habitats in a number of different ways:building houses,clearing forests to get lumber and to plant crops,draining rivers to bring water to those crops,and making streets and parking lots.
3.International tourism has brought in a phase where the opportunities of making quick profits from exploiting too much of what was regarded as freely available natural resources dazzled the eyes of government and businessmen,as well as many local residents. What is the sentence pattern?( ?。?/h2>