Complete the sentences using the answers or the verbs in the brackets. You have to decide where to use the future perfect or the future perfect continuous.
1. by Tuesday?
Yes, she'll have returned by Tuesday.
2. How long the mountain this time tomorrow?
John will have been descending the mountain for 48 hours.
3. When will you send the e-mail?
We it by Thursday. (deliver)
4. Can I have a look at your photos next time?
No, I'm sorry. I them by then. (not develop)