please help me With this sentence! Internal: A doctor injects tiny radioactive particles into the artery that sends blood to your liver. These block or destroy the blood supply to the tumor in your liver. Shouldn't it be "they" block or destroy... Thank you for helping.

I'm leaving work. I'm leaving work. Dose this means I'm going to quit my job ?

please help me with this sentence ! They may even use harmless bacteria as a transport link to arm other harmful bugs that pass by. I don't get the meanings of "transport link" and "arm" in this sentence. I appreciate your help. And have a good day.

why do we need a home? When the sky rains, we don't want to get wet. When snow falls down, we would play in the snow, but we definitely don't want to stay outside in the freezing temperatures with the snowman we made, especially at night. Speaking of night, we don't want to sleep at a place where all kinds of bugs can freely pass by your side, or worse, they may interested in you. Those are some of the seasons why do we need a home. But home is not just a place where we are living, because I'd rather get soaked in the rain, get my limbs numb in the cold and fight with the annoying bugs during the sleep, with my loved ones rather than lived in a palace alone.

in the dark When I stared to live a independent life and take responsibilities of my current as well as future life, I was so excited and full of energy because I thought I can pursue my dream in the exact way I want, I wanted to make sure every second in my life worth. But it was not long before I realized that I was not totally in control of myself, there wasn't anyone to hold me back or something, the enemy who was putting my enthusiastic down was me, the demon part of me. The dark of the night is not scary to me, but I was soaked in the dark that fall with the demon in my heart, I was starting to worry about myself. I'm still in this dark, and the only weapon I got is the faith that not to give up on myself. It's really a terrible war I am in. But, still I can't give up, maybe life is all about hang in there.