Keep off the drugs（毒品）,         you and your family will be in great danger?

 —Mark, where do you work?            —I work in a company        sells cars.

— Does your aunt usually walk the dog in the park?— Yeah,                bad weather stops her.

Is your washing machine ____________ working?

— Why didn’t you try your best to get on the subway? — I tried to, but it started moving ______ I could get on it.