Ⅰ.单句语法填空
1．Gun control is a subject about ______ Americans have argued for a long time.
【答案】 which
2．My wife entertained them ______ honored guests.
【答案】 as
3．I sometimes have occasion ______(visit) Birmingham on business.
【答案】 to visit
4．The film was very ______ and they were all ______ by it.(move)
【答案】 moving；moved
5．The police had got everything ready when the thief entered the supermarket and they took him ______ surprise.
