读下面海报, 完成下面三道题。 一、判断以下陈述的正误。(T或F) ( ) 1. Salad sauce is on sale on 9th, Oct. ( ) 2.There are three items on sale on 10th, Oct. ( ) 3. Oil is cheaper on 5th, Oct. ( ) 4. Cell phone is ¥1668 from 1st,Oct to 3rd, Oct. ( ) 5.Both banana and watermelon are on sale on 8th, Oct.