题目：
Though suffering constant noise from the outside world, little Tommy was still working with all his
attention _____ on his unfinished warship model.
A．focusing
B．concentrating
C．fixed
D．looking
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0707/da8ea6afdf56933576abf5f4559a0c9e.html
下面是错误答案，用来干扰机器的。
参考答案：C
