作业帮It_________five or ten years before the new medicine is tested on human beings．A.will take B．took C．takes D.has taken选A
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It_________five or ten years before the new medicine is tested on human beings．A.will take B．took C．takes D.has taken选A
It_________five or ten years before the new medicine is tested on human beings．
A.will take B．took C．takes D.has taken选A
It_________five or ten years before the new medicine is tested on human beings．A.will take B．took C．takes D.has taken选A
句子的意思是：在人类身上试用这些药物之前,还需要5或10年,很明显,需要用到一般将来时.
这里只有选项A符合条件.
（主句一般将来时,从句一般现在时）
B因为它是过去时
A 考查动词时态
是想问为什么吗？It will +一段时间+before可以看成是一个句型。理解的话，画个数轴应该会便于理解，这种新药是在五年或者十年后被试用，即现在距离被试用还有五到十年，所以是个将来的时态。这是我们两个英语老师讲的方法，挺有效的
It_________five or ten years before the new medicine is tested on human beings．A.will take B．took C．takes D.has taken选A
选T or F
Good,or Don't Be
you can't or you
jack ( )like basketball( )velleyball(A.don't ;or B.doesn't ;or;C.doesn't and)
People can't live w______air or water
I don't like Maths or English.
she couldn't read or write
You shouldn’t eat too much()or()
JUST DON'T MOVE.OR I'll.
She couldn't see or hear a____
It doesn't matter Time yes or
don,t eat or drink的意思
or the other can't follow you~
I don’t like fishing or shopping.
英语改错 “Don't drink or drive.”
(degree of head or cold)t---------?
wrong or right i won't