1. 答案:A/D.
2. 翻译:作为一名篮球选手,如果不会比他的兄弟更好的话,他(至少)也和他的兄弟一样好。
3. 解释:
1)as a basketball player是介宾短语,意思是“作为一名篮球选手”。
而as for的意思是“至于/关于...”,与句意不符,排除C;
like a basketball player意思是“像/比如一名篮球选手”,句意也不通顺,排除B。
2)而楼主把AD两个答案达成一样了。
此句可以改写为:
As a basketball player, he is as good as his brother, if (he is) not better than his brother.