1. Global warming has caused many natural disasters.
Many natural disasters__________________________________________________
2. After she had explained everything clearly, we started our work.
Before we_____________________________________________________________
3. I can’t come because I have to help my dad with something.
If I_____________________________________________________________________
4. Although he took a taxi, he still arrived late for school.
In spite of______________________________________________________________
5. “I am going to join the Science Club.”, said Nam
Nam said_______________________________________________________________