1.   Engineering does not start by knowing the answers but by attempting to fill the need.

2.   He also knew the answers to some touchy questions.

3.   I did not know the answer then, and I do not know it now.

4.   I mean, he knows the answers to all the questions in the Baby Trivia Quiz already.

5.   If you know the answer, raise your hand.

6.   Most of the time he knew the answers, but hated the silence in that terrible moment of everyone staring at him.

7.   Please let me know your answer as soon as possible.

8.   Press the buzzer if you know the answer.

9.   Put up your hand if you know the answer.

10.   Put your hand up if you know the answer.