第一题 That evening Beethoven played the music for the girl as well as usual.
这里只能用 as usual，原因如下：
usual 虽然是形容词，意思是“通常的; 常见的”，但是短语 as usual却变成了副词性，意思是“照例：和平常或习惯一样”；这一点与 as possible (尽可能)同出一辙，如：
* He arrived late as usual. 他照常迟到。
* As usual, I slept late that Saturday morning. 和平时一样，那个星期六早晨我起得很迟
* Com
