INSTRUCCIÓN: Complete the sentence using the phrase in brackets. USE SHORT FORMS ONLY IN NEGATIVE SENTENCES. EJEMPLO: He tried to print the file but he couldn’t get (can’t get) the printer to work.1. We vacíoneedn’t have tipped (needn’t tip) the waiter. The service was included in the bill.2. Tom vacíomust have seen (must see) the head teacher yesterday about the test he failed.3. Have you found my mobile? I think I vacíomay have left (may leave) it in your car.4. The guests vacíocan’t have arrived (can’t arrive) yet. Their plane’s expected in half an hour’s time.5. I vacíowould have thought (would think) it was obvious that it’s not OK to give your phone number to strangers!6. If you knew you weren’t coming, you vacíomight have phoned (might phoned) us in time to let us know.