Agriculture is the country's chief source of wealth, wheat ____ by far the biggest cereal crop. (TEM4-2003-41)
A: is
B: been
C: be
D: being
A: is
B: been
C: be
D: being
举一反三
- Agriculture is the country's chief source of wealth, wheat ______ by far the biggest cereal crop. A: is B: be C: to be D: being
- 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
- 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, rice ______ by far the biggest cereal crop. A: is B: been C: C. be D: D. being