these are the reasons which,____ to the tiredness ,cause And
these are the reasons which,____ to the tiredness ,cause Andrea to sleep so soundly.
A.add B.to add C.adding D.added
选哪个?为什么?cause 是谓语?
原题应改为:These were the reasons which,___ to the tiredness,cause Audrea to sleep so soundly.
刚才看错了。cause 是定语从句的谓语是一定的,但时态值得磋商,似改为过去时为好。但added 为过去分词,相当于which was added to the tiredness,