he has to study too much.he could do nothing except( )homework

he has to study too much.he could do nothing except( )homework

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