He couldn't answer this questin just now.=He _ _ _/_ _ _ answer this question just now.
问题描述:
He couldn't answer this questin just now.=He _ _ _/_ _ _ answer this question just now.
She has to stay in hospital for a month.(对for a month提问)
_ _ does she _ to stay in hospital?
Leo and David are the same weight=Leo is _ _ _ David.
答
1.wan't able to/ was unable to
2.How long,have
3.as heavy as