题目

— They got the first prize in the final contest. — ________. They made every effort to prepare for it. A. No way    B. I agree   C. Their success is no accident   D. They were so lucky 答案：C  考查交际用语。根据“They made every effort toprepare for it.”可以推知应选C。“Theirsuccess is no accident.”意为“他们的成功不是偶然的。”   下列发明中开创人类作战史新阶段的是（ ） A．简仪和高表的发明        B．以弹射方式射出火球的发明 C．管形火器的发明          D．以火药为推力的火箭的发明