3. Food safety is very important. So some rules______to stop people from polluting food.
A. should make B. should be made
C.was made D. has been made
【点拨】第①步:分析句意。食品安全非常重要。所以一些措施______来阻止人们污染食物。第②步:分析选项。should make一般现在时;should be made含有情态动词的被动语态;was made一般过去时的被动语态;has been made现在完成时的被动语态。第③步:分析句子结构。谓语动词“make”与主语“rules”之间为动宾关系,应用被动语态。根据句意可知,此处是指“规则应该被制定”,应用情态动词“should”。故选B。
4. I plan to build an unusual house. It ______ out of waste materials.
A. is built B. has built
C.will be built D. builds
【点拨】第①步:分析句意。我计划建造一个不同寻常的房子。它______由废弃材料制成。第②步:分析选项。is built一般现在时的被动语态;has built现在完成时;will be built一般将来时的被动语态;builds一般现在时。第③步:分析句子结构。谓语动词“build”与主语“It”之间存在动宾关系,应用被动语态。根据句意可知此处表示还未发生的事情,应用一般将来时。故选C。
5. In order to make our hometown more beautiful, lots of trees______in the past three years.
A. are planted B. were planted
C. have been planted D. will be planted
【点拨】第①步:分析句意。为了使我们的家乡更漂亮,很多树______在过去的三年里。第②步:分析选项。are planted一般现在时的被动语态;were planted一般过去时的被动语态;have been planted现在完成时的被动语态;will be planted一般将来时的被动语态。第③步:分析句子结构。谓语动词“plant”与主语“trees”之间存在动宾关系,应用被动语态。根据时间状语“in the past three years”可知应用现在完成时。故选C。
6. Hurry up! Once the concert starts, nobody ______(allow) to enter the concert hall.