Fill in the blanks with be to or have to (in it’s correct form). Hurry up! The bus arrive at two o’clock. If you are late, you walk home.
We …... take exams in four subjects in spring.
After his father’s death Robert … support his family.
It was a sunny place where they … live.
The train .…... have arrived by 7 o’clock. But it hasn’t come yet.
The book.…... be published at the end of the last year.
If you want to pass the exams successfully you .….. work hard.
When you have a computer, you won’t … waste so much time.
I felt nervous because I leave home for the first time.
A soldier obey orders.
I think we pay in advance.
You go through Carlisle on the way to Glasgow.

Fill in the blanks with be to or have to (in its correct form). Hurry up! The bus is to arrive at two o’clock. If you are late, you will have to walk home. Explanation: The sentence is referring to a future event (the arrival of the bus), so we use "is to" to indicate that the bus is scheduled to arrive at two o’clock. "Have to" is used to show the consequence of being late, which is having to walk home. We have to take exams in four subjects in spring. Explanation: Here, "have to" is used to indicate an obligation or requirement to take exams. We are obligated to take exams in four subjects in the spring. After his father’s death, Robert has to support his family. Explanation: "Has to" is used to indicate an obligation or necessity for Robert to support his family after his father’s death. He is required to take on this responsibility. It was a sunny place where they could live. Explanation: "Could" is used to indicate an ability or possibility to live in the sunny place. The sentence is expressing that it was possible for them to live in the sunny place. The train was to have arrived by 7 o’clock. But it hasn’t come yet. Explanation: "Was to have" is used to indicate a past event that was expected or scheduled to happen. The train was expected to arrive by 7 o’clock, but it hasn't arrived yet. The book was to be published at the end of last year. Explanation: "Was to be" is used to indicate a past event that was scheduled or planned. The book was planned to be published at the end of last year. If you want to pass the exams successfully, you have to work hard. Explanation: "Have to" is used to express the necessity or obligation to work hard in order to pass the exams successfully. When you have a computer, you won’t have to waste so much time. Explanation: "Won't have to" is used to express the absence of necessity or obligation in the future. When you have a computer, there will be no need to waste so much time. I felt nervous because I had to leave home for the first time. Explanation: "Had to" is used to indicate a past obligation or requirement that was necessary to leave home for the first time. This expresses the necessity or requirement to leave home. A soldier has to obey orders. Explanation: "Has to" is used to express the obligation or requirement for a soldier to obey orders. This indicates the duty of a soldier to follow orders. I think we have to pay in advance. Explanation: "Have to" is used to express the obligation or requirement to pay in advance. This indicates that it is necessary to pay beforehand. You go through Carlisle on the way to Glasgow. Explanation: No additional phrase is needed in this sentence, as it is already correctly structured. The sentence states a fact that you go through Carlisle when traveling to Glasgow.