4 : Bill is completely mad, he's completely ________.The possible answers were
out to lunch
for breakfast
a free lunch
a long dinner

英语测试：Idioms: Food 成语：食品（多选选择）BBC 答案 (ZT)
1. I don't like Keith, he's not a nice person, a thoroughly bad ________. The possible answers were:
piece of cake
egg
cheese
potato
egg
A bad egg 臭鸡蛋用来比喻令人讨厌或者是老坏事的人。
2. After Mr Johnson lost his job, his wife starting working as someone had to bring home the ________. The possible answers were:
sausages
beef
pie
bacon
bacon
To bring home the bacon 把薰肉带回家的意思是挣钱养家糊口。
3. Look at that little energetic puppy jumping up and running around. He's so full of ________. The possible answers were:
milk
coffee
beans
vegetables
beans
To be full of beans 意思是充满活力。
4 : Bill is completely mad, he's completely________.The possible answers were
out to lunch
for breakfast
a free lunch
a long dinner
Out to lunch 这个成语比喻一个人疯了，精神不正常了。
5. My boss is being so nice to me but I know he's only trying to ________ as he wants me to work during the holiday. The possible answers were:
bread and butter
carrot and stick
butter me up
eat humble pie
butter me up
To butter someone up 意思是奉承某人。
6. What a stupid ________ idea, it will never work. The possible answers were:
overcooked
half-baked
soft-boiled
undercooked
half-baked
A half-baked idea 或者plan，指的是不成熟的想法或者是计划。