Use because so to talk about the formation of echo in a sentence

1) Because the emperor was too young, the Empress Dowager Cixi was the regent.

(2) It was precisely because of the rain that he did not go to Xiao Wang's house.

(3) Because there is centripetal force, the apple will fall to the ground.

(4) Because of his unruly character, he is 35 years old and still a bachelor.

(5) Because the matter was so important, he hesitated and did not dare to say it all at once.

(6) Because he is not ashamed to ask questions, he can handle all kinds of things well.

(7) Because of this, you asked me to help you create your dream, right?

(8) Because life is short and fleeting, we must cherish time even more.