1. Choose the correct variant. 1) I’ll call you as/as soon as I return home.

2) The rain had stopped by the time/while we arrived at the station.

3) When/While we finish doing homework, we’ll tell you.

4) My dad ran into the parking meter as soon as/while he was parking the car.

5) She takes a shower after/before going to bed.

6) I am going to wait for him until/before he comes home.

7) He understood everything the moment that/whenever he saw everything with his

eyes.

8) I am ready to follow you while/whenever you start.

9) The scientists will do the experiment after/before their leader calls them.

10) Rose will invite us for a cup of tea, as/after she is interested in the affair.

2. Write the statements in Conditional 0.

1) Mix yellow and green (to get blue). - If you mix yellow and green, you get blue.

2) Leave butter in the sun (to melt).

3) Stay in the sun too long (to get sunburn).

4) Practise a foreign language hard (to learn).

5) Drink cold water (to have a sore throat).

6) Offer a tour beforehand (to have problems).

7) Smoke (to have lung disease).

8) Work hard (to achieve success).

9) Add milk to tea (to get English tea).

10) Heat ice (to turn into water).

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1) I’ll call you as soon as I return home.
- The correct variant is "as soon as". The phrase "as soon as" means immediately after, indicating that the speaker will call as soon as they arrive home.

2) The rain had stopped by the time we arrived at the station.
- The correct variant is "by the time". The phrase "by the time" refers to a specific point in time before another indicated event, in this case, the rain had stopped before the speaker arrived at the station.

3) When we finish doing homework, we’ll tell you.
- The correct variant is "When". The word "when" is used to indicate a specific time or moment in the future when the speaker will inform the listener.

4) My dad ran into the parking meter while he was parking the car.
- The correct variant is "while". The word "while" is used to describe an action that is happening at the same time as another action. In this case, the dad ran into the parking meter during the process of parking the car.

5) She takes a shower before going to bed.
- The correct variant is "before". The word "before" indicates that taking a shower is done prior to going to bed.

6) I am going to wait for him until he comes home.
- The correct variant is "until". The word "until" is used to indicate a specific moment or event in the future when the speaker will stop waiting. In this case, the speaker will wait for the person until they arrive home.

7) He understood everything the moment that he saw everything with his eyes.
- The correct variant is "the moment that". The phrase "the moment that" emphasizes the exact time when the person understood everything, which was when they saw everything with their eyes.

8) I am ready to follow you whenever you start.
- The correct variant is "whenever". The word "whenever" means at any time or whenever the action of starting happens.

9) The scientists will do the experiment after their leader calls them.
- The correct variant is "after". The word "after" indicates that the experiment will happen subsequent to the leader making a call.

10) Rose will invite us for a cup of tea after she is interested in the affair.
- The correct variant is "after". The word "after" indicates that Rose will invite the speaker for a cup of tea once she becomes interested in the affair.

Statements in Conditional 0:
1) If you mix yellow and green, you get blue.
2) If you leave butter in the sun, it melts.
3) If you stay in the sun too long, you get sunburned.
4) If you practice a foreign language hard, you learn it.
5) If you drink cold water, you can have a sore throat.
6) If you offer a tour beforehand, you won't have any problems.
7) If you smoke, you can have lung disease.
8) If you work hard, you achieve success.
9) If you add milk to tea, you get English tea.
10) If you heat ice, it turns into water.