Put the verbs in brackets into the correct present/past perfect tense 1. I'm afraid the exhibit (remove) for cleaning so you can't see it today
2. I (not/hear) of a market before I visited the museum
3. How long (Luke/read) that book about ancient Egypt?
4. He was tired yesterday evening because he (dig) at the archaeological site all day
5. (you/finish) your research yet?
6. The stars (use) by sailors to navigate the seas for centuries by the time the compass was invented
