根据句意写出括号内所给单词的适当形式。
At last, Daniel finished the difficult Maths problem _____________ (correct).
Shanghai Oriental Pearl（东方明珠）tower is famous for its _____________ (high).
---Can you tell me the _____________(climb) names? Their mobiles left here.
The poor men can’t buy _____________ (they) anything because they have no money with them.