问题
ce Craven, adoctor from the USA, is the author of several published reports, one of _______introduced the idea in 1953 _______ aspirin could reduce the risk of heartattacks
A:either
B:neither
C:both
D:none
B:neither
C:both
D:none
正确答案是：
同类题型
I hope I will not be called on in class as I’m not yet_________prepared [ ]
－Whereis that report? －I brought it to you you were in Mr Black’s office yesterday[ ]
Mike didn’t notice the sign ____ it was right in front of him.—How careless he is!
More and more trees should be planted in spring to _____ sandstorms happening frequently.[ ]