题目内容
---What should we do first if we want to develop our village?
---Lots of new roads ________, I think.
A. must built B. can build C. must be built
---Lots of new roads ________, I think.
A. must built B. can build C. must be built
C
此题考查含有情态动词的被动语态的基本结构,情态动词+be+过去分词
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