Final answer:
The verbs in brackets should be in the future simple tense for sentence 21, present simple tense for sentence 22, present perfect tense for sentence 23, future simple tense for sentence 24, and present perfect tense for sentence 25.
Step-by-step explanation:
21. We will have finished the shopping by the time you get home.
22. People will lose their jobs as robots fill their positions.
23. Professor Johnston has written three books since 2005, and she is working on her fourth.
24. I've decided I will book a trip into space as soon as I can afford it.
25. The International Space Station has been manned for 14 years in November.