I have $20 000 and I need $25 000,but my parents have promised to _______ the difference.

16Mary answered all the questions _____ the last one, which she had never heard of before

i Lei finished his work today— I have no idea, but he ______ it when Isaw him this morning.

How are you getting on with your workthese days——______.

This evening your uncles are coming to our party.—So, we need _______ food.