A large number of new schools to help those left-behind children next year.
A. will build
B. will be built
C. were built
D. are built
网友回答
A. will build
(答案→)B. will be built
C. were built
D. are built
解析：句意：明天要建大量的新学校来帮助这些留守儿童。结合语境及时间状语，可知本句描述的是将来发生的动作，故用一般将来时态，句子主语是动作对象，故用被动语态。故选B。