Today our knowledge of food and what it does for our bodies is far more ________ than that of the old times. [ ]

I didn’t expect that John would be absent from my last Sunday’s birthday party.—As far as I know, he ______ to see his parents in the countryside on Sundays

__________onto a plane

I’m sorry，the sales manager is not________.He is on the telephone at the moment.

Is Jack ____ friend of yours— No, I find it difficult to make ____ friends with him.