VI: 1. You won't learn to type unless you practice.

2. You won't understand it without studying it.

3. i won't mark untidy work if it is tidy.

4. Unless we find other fuels, it will be impossible to avoid polllution.

VI:

1. You won't learn to type unless you practice.

2. You won't understand it without studying it.

3. i won't mark untidy work if it is tidy.

4. Unless we find other fuels, it will be impossible to avoid polllution.

V.

1. He will come to the meeting if it is necessary

2. If we don't see the taxi first, we'll get the bus

3. Unless we spend it wisely, money can't buy happiness.

Chúc bạn học tốt nha!