求英语大神来把这五个句子改成特殊疑问句
1个回答

Maria has been studying English since 1999.

How long has Maria been studying English?

My cousin has been playing football for muchly 4 years.

How long has your cousin been playing football?

Alison has been skating for the whole 5 hours.

How long has Alison been skating

We have been waiting here for the whole 3 hours.

How long have you been waiting here?

Bill has been doing homework since he came back.

How long has Bill been doing homework?