Question

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 Food is expensive. It (to cost) a lot of money. Last night he (to invite) me to the party. Next Sunday we (to visit) the Tower of London

Answer 1

Глаголы надо поставить в настоящее, прошлое и будущее время:
 The food  is expensive.  It costs many money.
Last night he has invited me to a party.
 On the next Sunday we shall visit the Tower of London

Answer 2

it cost a lot of money.... he invited.....sunday we will visit....