应用抗癌药物疗效最佳的是
A．原发性卵巢癌
B．卵巢转移癌
C．子宫颈癌
D．子宫内膜癌
E．绒毛膜癌
参考答案：E
Everybody said it was a perfect marriage; no one had ever known________couple.
A．the happier
B．a happier
C．a happiest
D．the happiest
