Edison did the experiment for thousand times. _______, he invented the light bulb.

Mary is a beautiful and smart girl. _________, she is kind. She always takes care of the sick animals. ___________, every one likes her very much.

________ you watch the television, you need to finish you work first.

Dad works very hard for us ________ he can take us to go around the world in the future.

________ I am not clever, I try my best on my study.