1. a egg
2. a friend
3. a sink
4. an arm
5. a mouth
6. an onion
7. an umbrella
8. a classmate

1. My father is a doctor.
2. The Sun keeps the Earth warm.
3. A dolphin is an intelligent animal.
4. I have an orange shirt too.
5. My brother likes the blue pen, not the red one.

1. If I see a dog, I will run away.
2. Does your town have a gallery?
3. The Moon is bright tonight.
4. There is a big temple in the town; the temple is very old.
5. • Is your mother a teacher?
   • No, she isn't. She's an artist.

1. He is a robot designer.
2. In the future, we will live on the Moon.
3. I have some old toy robots. (Alternatively: the old toy robots, if talking about specific ones)
4. The car over there is mine.
5. The Earth goes around the Sun.

1. We have a cat, a dog, and a goldfish as pets.
2. The Earth is the third planet from the Sun.
3. My grandfather is an astronaut and my father is a pilot.
4. Do you live in a house or a flat?
5. Do you have an umbrella in your car?

1. If it (be) is sunny next week, we (go) will go on a picnic.
2. If we (recycle) recycle more, we (help) will help the Earth.
3. We (save) would save a lot of trees if we (not waste) didn't waste so much paper.
4. More people (have) would have fresh water if we (use) used less water.
5. If the river (not be) isn't dirty, there (be) will be more fish.

1. If they (build) build an airport here, it (be) will be very noisy.
2. People (save) will save the environment if they (reuse) reuse old items.
3. If we (grow) grow trees, our school (be) will be greener.

Part 1: Write a or an

1. an egg
2. a friend
3. a sink
4. an arm
5. a mouth
6. an onion
7. an umbrella
8. a classmate

Part 2: Write a/an or the

1. My father is a doctor.
2. The Sun keeps the Earth warm.
3. A dolphin is an intelligent animal.
4. I have an orange shirt too.
5. My brother likes a blue pen, not a red one.

Part 3: Write a/an or the

1. If I see a dog, I will run away.
2. Does your town have a gallery?
3. The Moon is bright tonight.
4. There is a big temple in the town. The temple is very old.
5. • Is your mother a teacher?
   • No, she isn't. She's an artist.

Part 4: Write a/an or the

1. He is a robot designer.
2. In the future, we will live on the Moon.
3. I have some old toy robots.
4. The car over there is mine.
5. The Earth goes around the Sun.

Part 5: Write a/an or the

1. We have a cat, a dog, and a goldfish as pets.
2. The Earth is the third planet from the Sun.
3. My grandfather is an astronaut and my father is a pilot.
4. Do you live in a house or a flat?
5. Do you have an umbrella in your car?

Conditional Sentences:

Part 1: Write the correct form of each verb in brackets

1. If it is sunny next week, we will go on a picnic.
2. If we recycle more, we will help the Earth.
3. We will save a lot of trees if we do not waste so much paper.
4. More people will have fresh water if we use less water.
5. If the river is not dirty, there will be more fish.

Part 2: Write the correct form of each verb in brackets

1. If they build an airport here, it will be very noisy.
2. People will save the environment if they reuse old items.
3. If we grow more trees, our school will be greener.