单选____,the experiment will be successful.A.If carefully doneB.If carefully doingC.If it done carefullyD.If doing carefully为什么选A不选D?
问题描述：
单选____,the experiment will be successful.
A.If carefully done
B.If carefully doing
C.If it done carefully
D.If doing carefully
为什么选A不选D?
答
你知不知道英语里 逗号前后的主语必须一致,入该题
如果你选D,那么 逗号前的句子的主语是人,人认真做题,而逗号后边的主语是实验,显然两句话的主语不一样,所以不能选.
选项A的主语是 实验,If carefully done的意思是,如果实验认真被做,那么实验就会成功.前后两句主语一致.
所以选A不选D 不知道你清除了没有