1) Дайте развернутые ответы на следующие вопросы, обращая внимание на употребление времен в придаточных времени и условия.1. Will you sign contracts if they give you a good discount?2. What will you do tomorrow after you look through the documents?3. Will you introduce Mr. Hunt to your sister if he is single?4. What will you do if you have a toothache?5. Will they only have to pay for their phone calls to their local service providers when they send e-mail messages?6. What shall we clear up before he leaves?7. Will you get in touch with them if they deliver the goods?

Will you sign contracts if they give you a good discount?
Yes, I will sign the contracts if they give me a good discount. In this sentence, the condition is expressed using the first conditional, meaning that if they give a good discount (present simple), I will sign the contracts (future simple). The future action depends on the present condition.

What will you do tomorrow after you look through the documents?
Tomorrow, after I look through the documents, I will decide what steps to take next. Here, "after you look" is in the present simple tense because it's referring to an event that will happen in the future. The main action "I will decide" uses the future simple tense because it will occur after the condition is met.

Will you introduce Mr. Hunt to your sister if he is single?
Yes, I will introduce Mr. Hunt to my sister if he is single. This sentence is also an example of the first conditional. The condition "if he is single" is in the present simple tense, while the main action "I will introduce" is in the future simple tense. The introduction will happen if the condition (being single) is true.

What will you do if you have a toothache?
If I have a toothache, I will go to the dentist. This is a conditional sentence using the first conditional. "If I have" is in the present simple tense, and the action "I will go" is in the future simple tense. The action of going to the dentist depends on the condition of having a toothache.

Will they only have to pay for their phone calls to their local service providers when they send e-mail messages?
No, they will have to pay for their phone calls regardless of whether they send e-mail messages or not. This question uses the future simple tense ("they will have to") and indicates a condition of payment occurring only when a specific event happens (sending e-mail messages).

What shall we clear up before he leaves?
Before he leaves, we shall clear up any misunderstandings regarding the project. In this case, "before he leaves" uses the present simple tense to refer to a future event, while "we shall clear up" is in the future simple tense, indicating the action that will be done before his departure.

Will you get in touch with them if they deliver the goods?
Yes, I will get in touch with them if they deliver the goods. This is a first conditional sentence where "if they deliver" is in the present simple tense, showing the condition, and "I will get in touch" is in the future simple tense, showing the action that will follow if the condition is met.