近年来,志愿者活动进入我国公众公共领域,志愿者们默默无闻,起早贪黑,风雨无阻,无怨无悔地坚守岗位,可他们从事志愿者工作没有一分钱的报酬,这些志愿者( )
—Do you know _______ the girl in red is? —I’m not sure. Maybe a doctor.
All of us went to the park _______ Bob. He had to look after his sister at home.
. Jim has _______ friends here, so he often stays at home and feels lonely.
—Is your ipad white, Mandy? —No, it isn’t. _______ is black.
—Do you know _______ man in jeans? —Yes. He’s a professor of _______ university.