1．The famous singer is popular with teenagers(十几岁的青少年)．
2．If you want to shoot the target (靶子)，you must aim at it a little bit higher.
3．The guards were ordered to shoot(射击) on sight anyone trying to escape.
4．In my view(观点) it was a waste of time.
5．We should calculate the normal(正常的) value of the building.
6．Stress has an effect on both your physical and mental health.
7．It is required that children under 14 should be accompanied by an adult．
8．Emergency line operator must always stay calm and make sure that they get all the information they need to send help.
9．Things can easily go wrong when people are under stress．
10．The elephant yelled to show its anger when another group came near.
