Задание

**Match, choose and write the idioms (it's not rocket science; be on the same wavelength; be light years ahead of; get one’s wires crossed) in the correct form to complete the exchanges. Use full forms of the verbs: e.g.: is, am, are,is not, are not ... .

A: Why did you get coloured ink for the printer? We need black.

B: Oops! We must have _____ because I thought you said we have enough black, buy colour cartridges.