cancer is a disease_ causes are still not clearly known A wh

cancer is a disease_ causes are still not clearly known A wh It is well known _________ a person eats causes changes in t It is well known （what ） a person eats causes changes in the When and why he came here () yet?A is not known B are not kn Scientists are still ( ) a cure for cancer .A.searching of B When and why he came here ________ yet.A.is not known B.are 发现两条外烟上写的标语不一样,一条是Smoking causes a cancer.另一条是Smoking causes We haven't known ____ there is life on Mars.A.that B.if C.wh ____the sun rises in the east is known to us all.A.What B.Wh Smoking causes mouth cancer It is still a question where the coming show will be held?wh 英语翻译It is clearly not appropriate for a student to litter an