He was the last man I wanted to meet, but I      managed to smile at him.

The farmers are in bad need of rain,but a (an)          large amount of rainfall will cause Floods.

Although modem organic food has become very popular, many people can' t figure out the difference between organic foods and ______ grown foods．

－If I’m not mistaken, your birthday is coming up. Has your brother sent you anything?－Not yet. He never forgets, _________.

—Hi, I hear you’re going to London this summer vacation. —            , I was going to, but now I have changed my plan.