She can’t help ______ for her family often, so she can’t help ______ why life is so hard.
After reading a joke, Tom ______ laughter.
My room is very comfortable ______ the fact that it is very small.
You should ______ him to be innocent until he is proved guilty.
After the long journey, the three of them went back home, ______ .
Though he started late, Mr. Guo played the piano as well as, if ______ ,you do.