Đáp án:

1​. because
2​. because
3​. therefore
4​. therefore
5​. because
6​. because of
7​. because
8​. because of
9​. therefore
10​. because1​. You shouldn't drive after drinking alcohol because it's dangerous.
2​. Being bullied, the boy didn't want to go to school anymore.
3​. His parents were very poor, therefore he had to quit school to go to work.
4​. Her car was broken yesterday, therefore she took the bus to work.
5​. She always needs to be looked after because she is a disabled woman.
6​. His son is often teased at school because of the birthmark on his face.
7​. They didn't go to the festival because it rained heavily.
8​. We couldn't hear anything because of the deafening noise of the drums the next-door neighbors were playing.
9​. The hurricane was moving directly toward a small coastal town; therefore, all residents were advised to move inland until it passed.
10​. My parents don't allow me to play violent games because they're afraid I might become violent too.