核心词汇
1．These chemicals have been found to cause serious environmental____________(损害)．
2．The government has issued a____________(警告)that the fish may not be fit to eat.
3．The earthquake was one of the worst natural____________(灾难)the country has ever suffered.
4．____________(满怀希望地)，I managed to pay off all my debts before we got married.
5．Do you have any____________(以前的)experience of this type of work?
