2. Choose the correct word. 1. I study hard and get/ become good grades.
2.1 speak English at the lessons because I want to improve/ successful my English.
3. I have a goal/grade. I want to become a firefighter.
4. I like football and I often watch it at the Zoo/ at the stadium.
5. I do/get my best. I want to become a world champion.​

1. I study hard and get good grades. In this sentence, the correct word is "get". This means that by studying hard, the person is able to achieve good grades. "Become" is not the correct word to use in this context as it does not correctly convey the meaning of achieving grades through hard work.

2. I speak English at the lessons because I want to improve my English. The correct word to use in this sentence is "improve". This means that the person wants to enhance their English language skills by speaking it during lessons. "Successful" is not the appropriate word here as it does not properly convey the intent of wanting to enhance language skills.

3. I have a goal to become a firefighter. The correct word to use in this sentence is "goal". It means that the person has an aspiration or objective to become a firefighter. Using the word "grade" in this context would not make sense as it does not align with a career aspiration mentioned in the sentence.

4. I like football and I often watch it at the stadium. The correct word to use in this sentence is "stadium". It means that the person goes to watch football matches at the stadium. "Zoo" is an incorrect word to use as it does not make sense in the context of watching football.

5. I do my best. I want to become a world champion. The correct word to use in this sentence is "do". It means that the person puts in their maximum effort and tries their hardest to achieve their goal of becoming a world champion. Using the word "get" in this sentence would not accurately convey the meaning of putting in effort towards a goal.