—By       local farmers, we hope        them improve their lives.—I think it’s a good idea. 

—Can you tell me what to wear at the party?—If I            you, I            the blue jeans.

I don’t know what happened to my pet. It just ________ eat whatever I feed her.

—The research on the new flu virus vaccine is challenging and demanding. Who do you think can do the job?     —______ my students have a try?

—Look at the picture on the wall. It ________be David’s.—Yes, his name is on the first page.