Genetically modified seeds __________________ in the U.S. since 1996
A: have been grown
B: has been grown
C: have grown
D: has grown
A: have been grown
B: has been grown
C: have grown
D: has grown
举一反三
- If the climate had been more favorable, the crops still better. A: would have grown B: would be growing C: would be grown D: will grow
- The population of the world______still________. A: has;grown B: will;grow C: is;growing D: is;grown
- Tension has been ___ between the employers and the workers on strike. A: built up B: put up C: grown up D: pulled up
- You have grown taller than before． .
- Green Life has grown ________ ... trees every spring.