__ fathers are both scientists.(A.Jim's and Bob B.Jim's and Bob's C.Jim and Bob's D.Jim and Bob)

问题描述:

__ fathers are both scientists.(A.Jim's and Bob B.Jim's and Bob's C.Jim and Bob's D.Jim and Bob)

B因为谓语动词是复数 所以这里指是他们各自的爸爸 选B