Use the Present Continuous, Present Simple or Future Simple Tense: 1. I ... (meet) my classmates tonight. 2. My mother ... (arrange) a party this Sunday. 3. She ... (read) an interesting novel at the moment. 4. The play ... (start) at 8 o'clock. 5. My parents say that I ...(probably, visit) Australia this summer. 6. Nick (work) in his lab every afternoon. 7. When (you, go) to say him about the accident? 8. What (you, do) in the evening?

1. I am meeting my classmates tonight.
In this sentence, we use the Present Continuous tense because the action of meeting the classmates is happening in the current moment or near future.

2. My mother is arranging a party this Sunday.
In this sentence, we also use the Present Continuous tense because the action of arranging a party is happening in the current moment or near future.

3. She is reading an interesting novel at the moment.
In this sentence, we use the Present Continuous tense because the action of reading the novel is happening at the current moment.

4. The play starts at 8 o'clock.
In this sentence, we use the Present Simple tense because the action of the play starting is a regular or scheduled event.

5. My parents say that I will probably visit Australia this summer.
In this sentence, we use the Future Simple tense because the action of visiting Australia will happen in the future.

6. Nick works in his lab every afternoon.
In this sentence, we use the Present Simple tense because the action of Nick working in his lab is a regular or habitual event.

7. When are you going to say him about the accident?
In this sentence, we use the Future Simple tense because the action of saying about the accident will happen in the future.

8. What do you do in the evening?
In this sentence, we use the Present Simple tense because the action of what you do in the evening is a regular or habitual event.