(2008? Huizhou simulation) Cinnamaldehyde F (chemical formula C9H8O) exists in cinnamon oil in nature, which is a common plant seasoning oil and is mainly used in industry.

Ethylene reacts with water to generate a C2H5OH, A reacts with catalysis to generate BCH3HO, C reacts with hydrolysis to generate C, D reacts with catalysis to generate D, B and D react with aldehyde to generate E, and E reacts with concentrated sulfuric acid to generate F,

(1) From the above analysis, it can be seen that the structural formula of cinnamaldehyde F is:, e is, and the names of oxygen-containing functional groups are: hydroxyl and aldehyde groups, so the answer is:; Hydroxyl group, aldehyde group;

(2) The reaction that accords with atomic economy is addition reaction. Among the questions, ① is an addition reaction, ② is an oxidation reaction, ③ is a substitution reaction, ④ is an oxidation reaction, ⑤ is an addition reaction and ⑤ is an elimination reaction, which is in line with atomic economy, so the answer is: ①;

(3) Reaction ⑥ is the elimination reaction; The chemical equation of reaction 4 is:, so the answer is: eliminate the reaction; ;

(4) The isomer of E () satisfies that there are two substituents on the benzene ring, one of which is methyl in the para position and belongs to ester, and the qualified isomer is:, so the answer is:.