Genetically modified seeds __________________ in the U.S. since 1996 A: have been grown B: has been grown C: have grown D: has grown

Six years ago lots of tea plants_______________ on the hill. A: is grown B: grown C: grew D: were grown

The population of the world______still________. A: has;grown B: will;grow C: is;growing D: is;grown

What is the main idea of the text A: organically grown foods are nutritious. B: how to buy organically grown foods. C: what does organically grown foods mean D: a general standard should be established to regulate the organically grown produce.

Belgian blue bull: ( ) A: It is a bull grown lots of muscle because a gene is inhibited. B: It is a bull grown lots of muscle because a gene is overexpressed. C: It is a bull grown lots of muscle because a gene that is missing. D: It is a bull grown lots of muscle because a gene that is duplicated.

Even grown-upscan’t lift the heavy box, let alone children. A: even more likely B: as for C: so to speak D: not to mention

She is grown up. She is ______ .

_________grown up, like an adult

Without sunlight, air and water, plants on the earth _____ well. A: will not grow B: would not grow C: had not grown D: would not be grown

Rice is grown in the north of eastern China.