题目

Many New Zealand cities lie ____ a bay and ____ a natural, deep harbor. A. on; enjoy         B. on; cover          C. off; include                   D. off; have 答案：A某市自来水水费是每吨1.75元。九月份小东家用水5.9吨，小兰家用水8.7吨，请帮他们算一算，这月他们各家应交水费多少元？