Read these sentences and fill in the gaps with the correct variant (must, mustn’t, have to, don’t have to, doesn’t have to or has to).
You
stop at the red light.

2. Mr. Dickson is travelling abroad this summer, so he
get his passport soon.

3. All the students
follow the school rules.

1. You must stop at the red light.

Explanation: "Must" is used to express a strong obligation or necessity. In this sentence, it is necessary for you to stop at the red light for safety reasons.

2. Mr. Dickson has to get his passport soon.

Explanation: "Has to" is used to express a specific obligation or requirement. In this sentence, Mr. Dickson is required to get his passport soon in order to travel abroad.

3. All the students must follow the school rules.

Explanation: "Must" is used to express a general obligation. In this sentence, all the students are obligated to follow the school rules as a part of their responsibilities as students.