选出适当的词，完成句子。
goes down   sweet and sour  apple juice  play
together  hard and big
1.—Touch the elephant, Mike. How does it feel?
—It's ________ ________ ________.   
2.—Let's ________ ________.
— OK.   
3.—Taste the grape juice, Alice. How does it taste?
—It's ________ ________ ________.   
4.—What do you want to drink?
—I want some ________ ________.   
5.—The sun ________ ________ in the evening.
—Yeah, my shadow is long.