The knowledge that his friends have deserted him is a ______ pill for Mr. Smith to swallow.

_________ scientist Tu Youyou won the Nobel Prize for medicine (诺贝尔医学奖)_________ October 5, 2015.

Don’t your homework at home, or the teacher may be angry with you.

YaoMingisafamousbasketballstar_______isplayingintheNBA.

_____ a report from WWF, the global warming has greatly _______ wildlife on the earth,destroying or damaging the habitats they are living in.[ ]