It's our duty to protect the country from dander.
It is not safe to cross the street when the green light is on.
It is unsure if the traffic will be better.
It is difficult to predict the occurance of a tsunami.
It is not difficult to say you are sorry.
It took nearly ten hours to reach the top of the mountain.
It's time for me to do it on my own.
It's too late to try again.
It's time to lend your helping hands.
It's all about making good connections.