题目

Luckily some friends living locally came to visit me regularly and I went home every weekend, otherwise I ________ mad. A. was going   B. would go    C. had gone   D. would have gone   答案：D他是古希腊最负盛名的数学家、物理学家和发明家，杰出的爱国者，他发现的杠杆原理和浮力定律等为力学的进一步发展开辟了道路，……这里的他是指 A．欧几里得         B．阿基米得        C．祖冲之              D．华罗庚