第1个回答 2014-01-10
Martin is quite clever, and he has no difficulty in learning Chinese.
第2个回答 2014-01-10
Martin is smart and there is no difficulty for him to study Chinese
第3个回答 2014-01-10
Martin is very smart. He studies Chinese without any difficulty.
第4个回答 2014-01-10
martin is very clever, he has no difficulty in learning Chinese