He often sat in a small bar drinking con
题型：选择题
问题：
He often sat in a small bar drinking considerably more than ________.
a. was good for his health b. his health was good
c. his good health d. was in good health
题型：选择题
已知A、B是两种常见的单质，甲、乙是两种常见的化合物．常温下A为黑色固体，其余均为气体．
在一定条件下它们之间相互转化的关系如图所示：
（1）写出甲、乙的化学式：甲______；乙______．
（2）按要求完成下列化学反应方程式：
①A+B 反应的化学方程式：______；
②甲+A反应的化学方程式：______；
③乙+B反应的化学方程式：______．