Put the verbs in brackets into the correct present\past perfect tense. ⦁ I’ve got a headache because I --------------------- (look) at my computer screen all day. ⦁ The sundial -----------------------(use) for around 1500years by the clepsydra was invented. ⦁ --------------------------------(you\finish) your project yet? ⦁ Assel was tired brcause she ------------------------------(travel) all day. The slideshow turned out to be a disaster because the equipment-----------------------------(not\check) for weeks