3. Luke wants to study overseas, but he is afraid of living alone.
->Although...
4. An underground train across London costs £6 while a taxi costs £15. (CHEAPER)
→
5. Oil and coal are easy to find.
=> It is not....
6.It's a good idea to go there by coach
=> We should...
7. We took a boat trip to Ellis Island.
→ We went............
8. Both Vietnamese and Chinese people visit relatives on Lunar New Year.
→ Like.............
9. It's our duty to keep the classroom clean and tidy.
→ We........
10. We'll go to the theater by taxi, so it's unnecessary for you to drive.
→ We'll go to the theater by taxi, so you........
11. It is not good for you to drink water from the tap without boiling it first.
=> You shouldn't.......
12. It's not necessary for us to finish this work today.
=> We don't have to ......
13. It's a good idea to listen to the weather forecast before going fishing.
You should.......
14. It's a good idea to do exercise regularly.
-
You should.......
15. My sightseeing tour in Melbourne lasted two hours. (GOING)
→I spent.......
16. Mary studied a lot for her biology test. However, she didn't pass it.
→ Although...
17. Cities use more electricity than villages.
Villages.......
18. She didn't go to class yesterday.
=> She was absent
19. Hambry gets less energy from oil than Highdale.
=> Highdale gets
20. Lan didn't go to school yesterday.
=> Lan was...
21. You can sing more beautifully than I can.
=> I can.....
22. Let's have a charity car wash.
→ What
23. We plan to go to the bowling alley next weekend.
→ We are
24.Oil and coal aren't easy to find.
=> It is not difficult