diligence

She doesn't look it, but she's a real go-getter.

She went to great pains to become able to speak English.

She seized every opportunity to improve her English.

She studied her heart out and passed the exam.

She had to study hard to catch up with her classmates.

She must have been studying hard.

She studied hard, but failed the exam.

Despite her low pay, she works hard at the company.

She was busily devoting herself to her knitting.

She launched into playing the piano with enthusiasm.

She is utterly immersed in her research.

She was carefully styling her hair.

She works just as hard as her brothers do.

She's thought to be diligent.

She had to study hard to catch up with her classmates.

She has to study hard to catch up with the rest of her class.

She's working hard.

She poured all her effort into writing the letter.

She gave it her all but failed.

She is very studious.

She is a very diligent student.

She must have worked very diligently.

She's very smart, and on top of that, she studies hard.

She was such a diligent girl that her French improved greatly.

She studies very hard.

She is a very serious person.

She studies eagerly.

She enthusiastically struck up a conversation.

She succeeded because she worked hard.

She worked hard.