In spite of being sick, Mary insisted on going to work.

hoặc

In spite of her sickness, Mary insisted on going to work.

Currently, English is the main subject of all generations of students. If the future is not difficult in terms of hands and feet, in addition to learning good language and math, you need to focus on learning English. Many people think English is difficult, but they don't know that others also start from scratch. If you want to learn English, you have to work hard. Learn from easy first, then learn the difficult word after. Practice speaking in front of the mirror, telling your friends, and the teacher hears where you are wrong, and you will correct it if you stumble. In addition, you can go to the software to learn English on the Internet to learn if you can afford it. always put him first. Good luck.