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3. They started playing football an hour ago. → They have
 
4. Let's use public buses instead of motorbikes. →What about 5. If you don't succeed, you will have to try it again.
 
→ Unless
 
6. It is a national holiday, so you won't find many shops open.
 
→Because
 
7. The children are going swimming because the weather is hot. →Because of
 
8. People use the Internet as a means of education.
 
→The Internet 9. The actress wore sunglasses because she didn't want anybody to recognize her.
 
→The actress 10. I can't drive because I haven't passed the driving test.
 
→Because of