1. It took the firemen three days to put out the forest fire.

It took + O + time + to V: mất bao nhiêu thời gian làm gì 

2. You should read guidelines for the new tsunimal carefully.

should + V1: nên làm gì 

3. Unless James brings a compass, he will get lost in the jungle.

If 1: If + HTĐ, S+ will/can/shall .. + V1 

Unless: trừ khi = If ... not ....

4. Although it rained heavily, Kathy still decided to go to help the victims of the earthquake.

Although + clause, clause: mặc dù 

5. As it rained heavily on the hills, water in the lake started to rise.

As + clause, clause: vì 

6. Although it rained hard, rescue workers are still trying to save people in the flooded area.

Although + clause, clause: mặc dù 

7. She's interested in hanging out with friends on Saturday evening,

be interested in + Ving / N : thích 

8. Why don't we ask the local people for protecting the environment?

Why don't we + V1? đưa ra ý kiến 

9. If he doesn't phone her immediately, he won't get any information. 

If 1: If + HTĐ, S+ will/can/shall .. + V1 

Unless: trừ khi = If ... not ....