这句话是说,尽管癌症的原因已经慢慢被揭示出来,
然而我们还没有什么有效的方式去阻止它的发生.或者说,
尽管癌症的病因正在被一点一点地揭开,但现在我们没有可以预防它的实用方法.
这道题目其实可以用排除法,因为uncover是个及物动词,表示揭示,那么这里说癌症的原因,
显然是被揭示,要用被动,而BCD全部都是主动,
只能用A选项.致癌原因正被揭开,故选进行时的被动语态.
although the cause of cancer ___ ,we do not yet have any pra
1个回答
相关问题
-
英语高考28.Although the causes of cancer ____,we do not yet have
-
Do you think our life is full of causes of cancer?why?
-
not,have,to,we,do,the,goldfish,feed,much,it,is,any,not,so,tr
-
We have some pens .（改为否定句） We have not any pens.还是 We do not
-
have yet to do sth.=have not yet done sth.
-
Although I was not one of the winner,Iwas proud of that we h
-
many of us want to watch the ball game,yet we don'thave any
-
A:Have you got____ready for the sports meeting B:Not yet .We
-
This IMEI number seems to be correct,but we do not have any
-
I have yet to find the answer.= I have not as yet found the