1．Employees are_permitted (允许) to use the golf course during their free hours.
2．A lot of_poisonous (有毒的) waste water comes from that chemical factory.
3．The government has declared (宣布) a state of emergency because of the infectious disease.
4．The impression she had made on me faded (消退) gradually from my mind.
5．It's difficult to find a permanent (长久的；永久的) cure for this disease.
6．The black did not know which part of Africa their ancestors (祖先) had come from.
7．Don't press (挤，压) this ball hard, otherwise you will get it blown up.
8．Modern international business is believed to come from this initial (最初的) trade form.
Ⅱ.单句改错
1．Could I drop in on your house after the concert？on→at
2．With all the things she needed buying, she went home happily.buying→bought
3．It is advisable to keep a little food in reserve in case emergency.emergency前加of
4．You rather than I am going to go camping.am→are
5．In 1938, Hitler declared war against Poland, which started the Second World War.against→on
