WithHalloweenapproaching,thereexistsarealconcernamongparentsandteacherstrickortreatingwillbecomeaseriousanti-socialactivity.awhetherbthat既然是concern关注,语气应该是不肯定的吧,ontheblood

Question

With Halloween approaching,there exists a real concern among parents and teachers__________ trick or treating will become a serious anti-social activity.
a whether b that
既然是concern关注,语气应该是不肯定的吧,
_____________ on the blood of humans and animals ,female mosquitoes often carry a dangerous diease which can spread quickly.
答案feeding,怎么判断主被动,这里feed的用法是什么

Answer 1

1,conern在这里是顾虑,担心的意思.翻译为：随着万圣节的到来,家长和老师都很担心trick or traeting将会成为一种严重令人讨厌的活动.whether也可引导同位语从句,但在这里不合适.
2,feed on是以什么为食,以什么为生的意思,前面的分词要和后面的主语判断主被动关系.这题明显是,母蚊子以人类和动物的血液为食,显然是主动关系,所以用现在分词.如果是被动关系,就要用过去分词了.
总结：
第一题,考察同位语从句和concern的意思,所以以后记单词不能只记一种意思.
第二题,考察非谓语动词的用法,你可以多找些非谓语动词这些题型做做,找找方法.