Greatly_________ as the leading scientist,he was asked to give lectures in many countries.

A．respecting

B．respects

C．respected

D．to respect

列宁生活在垄断资本主义阶段，他科学地揭示了（）

A.资本主义必然灭亡的规律

B.资本主义发展不平衡的规律

C.资本主义经济危机的规律

D.社会主义市场经济的规律