I've put a lot of work in improving my English.

我下了很大工夫进修英文。

She wrote about being the first Malawian broadcaster to win a British Chevening scholarship, which enabled her to go and study for a Masters degree in journalism at the University of Wales, Cardiff.

她是第一位马拉威广播人赢得英国Chevening奖，她有机会在卡尔地夫威尔斯大进修新闻。