1.  While the flighter was showing the most advanced planet at that time the engine suddenly stopped and the plane crashed to the ground.

2.  While the pilot was showing the most advanced planet at that time the engine suddenly stopped and the plane crashed to the ground.

3.  At present, the online education popularizes.

4.  At the same time, varieties of other problems are appearing.

5.  They are prepared to provide us with no paid help at any time.

6.  At the same time, we should avoid making bad friends, who will have bad effects on us.

7.  At the same time, you want to know more about them.

8.  At the present day, the online education is universal.

9.  At that time, online education is coming, so, it become popular is necessary.

10.  At the same time, human beings are good at thinking and creating.

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