21.As __ announced in today's papers,the Shanghai Export Commodities Fair is also open on Sundays.
A.being B,is C.to be D.been 这个题选什么?为什么A不可以?我觉得应该用非谓语动词的形式呀
选B.as引导非限制性定语从句,as在从句中作主语,所以后面需要谓语动词形式.
as意思是正如.
as后面没有接现在分词的用法.after可以.
After finishing my work,I went back home.
32.Our friends are expected to assume the burden of their own defense,__they are competent to do.
A.which we are centain B,that we are centain of
C.of which we are sure D.for which we are sure
这个题选什么,为什么?如何翻译
选C.词组be sure of sth要求的这个定语从句要用介词of+which来引导.
be sure of 是固定搭配,意思是："对……表示肯定" ,再有,这个句子是考查定语从句的用法.
首先横线前面有个逗号,逗号后面不能用that 引导非限制定语从句,所以which we are sure of.这里be sure of 是固定搭配,意思是："对……表示肯定" ,再有,这个句子是很典型地考察定语从句的用法.
首先,横线前面有个逗号,逗号后面不能用that ,所以排除B.
其次,A选项的which 前面应该加一个of ,意思跟 be sure of 一样.
再次,C和D的 which 前面用了 for 是不对的,没有 be sure for 的词组,而有for sure(确定)
翻译：我们的朋友都将承担起自己的防御,对此我们确信相信他们有能力这样做.