中国大学MOOC: Agriculture is the country’s chief source of wealth, wheat ____ by far the cereal crop.
举一反三
- Agriculture is the country’s chief source of wealth, wheat ____ by far the biggest cereal crop.
- Agriculture is the country’s chief source of wealth, wheat ____ by far the cereal crop.( ) A: be B: been C: being D: is
- Agriculture is the country's chief source of wealth, wheat ___ by far the biggest cereal crop. A: is B: een C: e D: eing
- 03-51 Agriculture is the country’s chief source of wealth, wheat ____ by far the biggest cereal crop. A: A. is B: B. been C: C. be D: D. being
- Agriculture is the country's chief source of wealth,wheat______by far thebiggest cereal crop.(2003.TEM-4) A: is B: been C: be D: being