ⅰ.单项填空 1．the boy lay on his back，his teeth ________ and his glaring eyes ________. a．set；looked b．set；looking c．setting；looked d．setting；looking 2．people are struggling________ pollution. a．for b．against c．to d．on 3．it is often said that ________ teachers have ________ very easy life. a．/；/ b．/；a c．the；/ d．the；a 4．—may i open the window to let in some fresh air? —________ a．come on. b．take care. c．go ahead! d．hold on! 5．he expanded________ his new theory. a．in b．into c．about d．on 6．susan wanted to be independent from her parents.she tried ________ alone，but she didn’t like it and moved back home. a．living b．to live c．to be living d．having lived 7.—you were brave enough to raise objections at the meeting. —well，now i regret________ that.
