问题描述:
---What should we do first if we want to develop our hometown?
---A number of new roads_______,I think.()
A.must build
B.have to build
C.must be built
D.have built
问题:
问题描述:
---What should we do first if we want to develop our hometown?
---A number of new roads_______,I think.()
A.must build
B.have to build
C.must be built
D.have built
杜纲回答:
答案:C根据Whatshouldwedo可知,这是含情态动词的句子;又因为主语是Anumberofnewroads是动词build的承受者,应该用情态动词的被动语态.情态动词的被动语态的构成是:情态动词的+be+动词的过去分词,故选C.