1.the tour guide tells us not to throw rubbish.
=>the tour guide say that we...
2. not many people can understand his lecture.
=>only...?
3.phong was sleepy, but he still stayed up late to watch the end of the game on TV.
=> although ....
4. our resources of energy will soon end because we don't try to save it.
=> If....
1. The tour guide says that we should not throw rubbish.
2. Only a few people can understand his lecture?
3. Although Phong was sleepy, he still stayed up late to watch the end of the game on TV.
4. If we don't try to save it, our resources of energy will soon end.
1.the tour guide tells us not to throw rubbish.
=>the tour guide say that we...shouldn't throw rubbish
2. not many people can understand his lecture.
=>only. a few people can understand his lecture..?
3.phong was sleepy, but he still stayed up late to watch the end of the game on TV.
=> although ....Phong was sleepy, he still stayed up late to watch the end of the game on TV.
4. our resources of energy will soon end because we don't try to save it.
=> If....we don't try to save our resources of energy, they will soon end