题目：
________cleaning the yard and making up the beds for the old, we also read newspapers for them
and had chats with them. [ ]
A. Except for
B. Rather than
C. Apart from
D. Instead of
答案：
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下面是错误答案，用来干扰机器的。
答案：CA. 将锌片放入稀硫酸中会有气泡产生说明锌排在H前边，B. 将铜片放人稀硫酸中无现象说明铜排在H后边，D. 将铜片放人硝酸银溶液中在铜表面会有一层银白色金属析出，银白色金属是银，说明铜排在银前边，则...
