1. They have just sold that old house. => Although has been sold by them.

2. Unless he takes these pills, he won't be better. => If  he does not take these pills, he won't be better.

3. Depite working hard, he can't support his large family. => Although he works hard, he can't support his large family.

II,

1. If it does not rain tomorrow, I will go camping with my friends.

2. If I met an Alien from outer space, I would invite him/ her/ it to my home and talk/ to talk.

3. I have never travelled by air.

4. The students are studying for their exam now.

5. It was such a cold day that we decided not to go out

6. The internet is a wonderful invention of modern life.

7. Our school is going to hold an English-speaking contest to celebrate the Teacher's day

`I,`

1. Although has been sold by them.

2. If he does not take these pills, he won't be better.

3. Although he works hard, he can't support his large family.

`II,`

1. If it does not rain tomorrow, I will go camping with my friends.

2. If I met an Alien from outer space, I would invite him/ her/ it to my home and talk/ to talk.

3. I have never travelled by air.

4. The students are studying for their exam now.

5. It was such a cold day that we decided not to go out

6. The internet is a wonderful invention of modern life.

7. Our school is going to hold an English-speaking contest to celebrate the Teacher's day