题目内容：

he has to study too much.he could do nothing except( )homework
A\do
B\doing
说理由,答案是A我觉得是B

优质解答

答案是A.[he could do nothing except(do )homework.]
理由:前面有"could",后面的"do"必须是现在时"do"; 不是"doing".
注:虽然以上句子是可以接受,最好这样写:
"he could do nothing [but do] homework."