Cyclohexanone is to be treated with $\mathrm{CH}{}_3\mathrm{MgBr}$ in a suitable solvent, followed by aqueous work-up. Which solvents are suitable for the addition step?

Grignard reagents are stabilised by coordination of ether oxygen to magnesium, so diethyl ether and THF are suitable and are non-acidic and non-electrophilic. Ethyl acetate has an ester carbonyl that reacts with $\mathrm{CH}{}_3\mathrm{MgBr}$ (competing addition), and methanol protonates the reagent to $\mathrm{CH}{}_4$.