A) are to challenge C) have been challenged B) may be challenged D) are challenging 全句的意思是:“虽然牛顿是个伟大的人物,但他的许多见解直到今天还在受到挑战,并且被现代科学家的工作所修正。”challenge是及物动词,在本句中应当是被动语态;其动作延续到今天...
Not knowing her address, I wasn't able to contact her. = Because I did not know her address, I wasn't able to contact her. 三、表条件,可以和条件状语从句互换。如: Walking to work, you will save quite a lot of money.= If you walk to work, you will sa...
come to 共计,达到 come true 变为现实,成为事实 come up 上来,上升,抬头 come up with 追上,赶上;想出(主意);找出(答案) get get along with 与……相处 get away 逃; 离 get back 返回; 回来; 回家 get close (to) 接近 get down 降下 ...
when inflation was high and unemployment low, to a place that's more appropriate given where we are now and where we expect to be. And that process will take place over time. There's nothing in the SEP that suggests the committee is in a rush to ge...
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