Combine these sentences with the words or phrases given

VI. Combine these sentences with the words or phrases given.

1. The world’s energy resources are limited. We should use them economically. (so)

=> …………………………………………………………………………………………………………...

2. The cost of installation is very high. Solar domestic heating systems are economical to use. (but)

=> …………………………………………………………………………………………………………...

3. I don’t agree with his teaching methods. He is a good teacher. (although)

=> …………………………………………………………………………………………………………...

4. We had better not waste water. We won’t have enough to drink. (or)

=> …………………………………………………………………………………………………………...

5. He doesn’t know his brother’s password, so he can’t open the e-mail. (If)

=> …………………………………………………………………………………………………………...